Why do we say "time is an illusion" but "a terrifying silence"? Master the tricky exceptions of uncountable concepts by practicing **zero articles for general ideas**, **definite articles for specified nouns**, and **indefinite articles for modified abstract nouns**.
> See a quick refresher inside!


Articles with Abstract Nouns

Do you know when to write "the human brain" but leave "qualitative research" without an article? Master the nuances of formal scholarly writing by testing yourself on **generic classes**, **abstract nouns with post-modification**, and **zero-article rules** for diseases and academic disciplines.
> See a quick refresher inside!


Articles in Academic Writing

Do you know how to use "Try as I might" or "Ridiculous as it sounds" correctly? Master advanced contrast structures by testing yourself on **fronted adjectives with as/though**, **verb fronting**, **albeit**, and **much as**.
> See a quick refresher inside!


Advanced Concessive Clauses: As, Though, and Albeit

Are you ready to move beyond basic "if" clauses? Test your advanced grammar skills by mastering nuanced conditional phrases like **supposing**, **provided that**, **on condition that**, **even if**, and **but for**.
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Conditional Conjunctions: Supposing, Provided That, and Even If

Is it grammatically correct to say "another three weeks" or "many a student has"? Master the trickiest English agreement rules by testing your knowledge of **"many a" phrases**, **amount vs. number**, and determiners with **irregular plurals** and **uncountable nouns**.
> See a quick refresher inside!


Advanced Determiner-Noun Agreement

Do you know how to elegantly pivot back to a main story after a random tangent, or correctly use formal words like *albeit* and *notwithstanding*? Test your mastery of advanced transitions by practicing **markers of concession**, **extent and purpose**, and **reformulation and resumption** across 10 challenging questions.
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Advanced Discourse Markers

Ever wondered why "the file is scheduled to be deleted" sounds perfectly fine, but "the file was attempted to be deleted" is grammatically wrong? Test your advanced grammar skills on **acceptable double passives**, **reporting verbs for rumors**, and **verbs that reject passive infinitives**.
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Mastering Double Passive Constructions

Why repeat yourself when you can drop words to create elegant, concise sentences? Test your advanced grammar skills on **gapping**, **verb phrase (VP) ellipsis**, and **right node raising** across 10 challenging questions.
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Ellipsis in Coordination

Do you know why we say **Never have I seen...** instead of **I have never seen...**? Learn how to add dramatic flair to your English by mastering **negative adverbial inversion**, **locative fronting**, and **inverted conditionals**.
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Advanced Fronting and Inversion

Do you know how to express an unfulfilled plan from the past or calculate exact durations leading up to a future deadline? Test your advanced grammar skills by mastering the **future perfect continuous**, **future in the past**, and nuanced expectation phrases like **bound to** and **on the verge of**.
> See a quick refresher inside!


Advanced Future Forms and Future in the Past

Do you know when to use **got caught** instead of **was caught**, or why a theory is **understood** rather than **got understood**? Challenge yourself with complex sentence structures, including **dynamic get-passives**, **causative delegation**, and **adversative passives** for describing unexpected misfortunes.
> See a quick refresher inside!


Get-Passives and Other Variations

Can you spot a hypothetical situation when the word "if" is nowhere to be found? Navigate 10 tricky scenarios by identifying **implied conditionals** hidden within phrases like **but for**, **otherwise**, **given**, and **implied subjects**.
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Implied Conditionals: But For, Without, and Otherwise

Do you know how to drop the "if" to make your English sound more formal and dramatic? Master the art of inversion by testing your knowledge of **first conditionals with should**, **second conditionals with were**, **third conditionals with had**, and complex **mixed conditionals**.
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Advanced Inverted Conditionals: Should, Were, and Had

Do you know whether to write "It is I who is" or "It is I who am"? Test your advanced syntax skills by mastering **pronoun and verb agreement**, emphasizing **prepositional phrases**, and structuring complex **adverbial and negative time clauses**.
> See a quick refresher inside!


Mastering It-Cleft Sentences: Agreement and Adverbials

Are you confused about when to use "needn't have done" instead of "didn't need to do"? Master the trickiest rules of English verbs by testing yourself on **marginal modals**, **past regrets with ought to**, and the **modal forms of dare and need**.
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Marginal Modals: Dare, Need, and Ought To

Do you know the difference between an action that *shouldn't have been done* and one that *needn't have been done*? Put your advanced grammar skills to the test with **continuous deductions**, **passive obligations**, and **unnecessary past actions**.
> See a quick refresher inside!


Complex Past Modals: Continuous and Passive Forms

Can you clearly explain a chaotic sequence of past events without losing your listener? Put your storytelling skills to the test by mastering the **Past Simple**, **Past Continuous**, **Past Perfect**, and **Past Perfect Continuous** tenses in dramatic, real-world contexts.
> See a quick refresher inside!


Narrative Tenses in Context

Do you know whether to write "I leave my fortune to whoever" or "to whomever" when it follows a preposition? Master advanced pronoun cases by testing yourself on **whoever vs. whomever**, **what vs. that**, and tricky **verb agreement** within **nominal relative clauses**.
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Nominal Relative Clauses: Whoever, Whomever, and What

Are you *impervious to* grammar mistakes, or is your writing *fraught with* preposition errors? Test your high-level vocabulary by mastering advanced **prepositional verbs** and **adjective-preposition combinations** across dramatic, real-world scenarios.
> See a quick refresher inside!


Prepositional Verbs and Adjectives

Do you know if a rumored corporate merger is **in the offing** or *on* the offing? Test your mastery of advanced, fixed phrases by choosing the correct prepositions for expressions like **by dint of**, **under the auspices**, **out of kilter**, and **at the behest of**.
> See a quick refresher inside!


Prepositions in Idiomatic Expressions

Can you confidently use present verbs to describe tomorrow's plans? Test your advanced grammar skills by mastering **scheduled events**, **fixed personal arrangements**, and **future time clauses** across high-stakes scenarios.
> See a quick refresher inside!


Present Tenses for Future Events

Why do we say "most people" but "most of the people"? Master tricky grammar rules by testing yourself on **quantifiers with object pronouns**, **specific vs. general determiners**, and complex structures like **every one of** and **none of the**.
> See a quick refresher inside!


Quantifiers with Of-Structures

Do you know how to link sentences using words like *some*, *none*, or *half* without creating a dreaded comma splice? Test your advanced grammar skills by mastering **quantifiers with relative pronouns**, choosing correctly between **whom**, **which**, and the tricky possessive **whose**.
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Relative Clauses with Quantifiers

Do you know how to accurately report tricky statements like "What shall I do?" or "You mustn't enter"? Shifting modal verbs into reported speech requires much more than just a simple tense backshift. Test your advanced grammar skills on **reporting shall for advice**, **must for prohibitions and obligations**, and **past modal deductions** like **must have** and **might have**.
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Reporting with Modals

Do you still use question word order when reporting what someone asked? Test your advanced grammar skills on **reported wh- questions**, **yes/no questions**, and **infinitive commands** in this 10-question challenge.
> See a quick refresher inside!


Reported Questions and Commands

Do you know the difference between "He spoke thankfully" and "Thankfully, he spoke"? Test your ability to set the tone of a sentence by mastering **sentence adverbs**, distinguishing them from **adverbs of manner**, and expressing **attitude and certainty**.
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Advanced Sentence Adverbs

Have you ever wondered why we say "be that as it may" instead of "is that as it may"? Master the remnants of the English subjunctive mood by practicing **fixed expressions**, **concessive phrases**, and **hypothetical idioms** across 10 challenging scenarios.
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Subjunctive in Fixed Expressions

Why do we say "I demand that he *be* fired" instead of "is fired"? The formal subjunctive mood ignores standard conjugation rules to express urgency, necessity, or strict demands. Test your advanced grammar skills by applying the **active and passive subjunctive**, **negative subjunctive forms**, and the **continuous subjunctive**.
> See a quick refresher inside!


The Subjunctive in That-Clauses

Do you know when to say "I suspect not" instead of "I don't suspect so"? Master advanced clause replacement by practicing **negative expectations**, **adjective substitution**, **verb phrase fronting**, and the tricky rules of **stative verbs with "do"**.
> See a quick refresher inside!


Substitution with So, Not, and Do

Do you know when to use "Were I to go" instead of "If I was going"? Master the art of formal hypotheticals by testing yourself on **subject-verb inversion**, the **"were to" future conditional**, and tricky **mixed conditionals**.
> See a quick refresher inside!


The Were-Subjunctive in Conditionals

Want to add a dramatic, native-level flair to your English sentences? Test your advanced grammar skills by mastering **standard wh-clefts**, **reversed wh-clefts**, **action-focused cleft structures**, and **pseudo-clefts**.
> See a quick refresher inside!


Wh-Cleft Sentences: Standard, Reversed, and Action Focus

Do you know when a strict rule requires *provided that* or when to use *unless* instead of *if not*? Master the logic of condition clauses by navigating quirky scenarios with time travelers, secret agents, and eccentric professors. Test your grasp of **if**, **unless**, and **provided that** across 12 interactive questions.
> See a quick refresher inside!


Condition Clauses: If, Unless, and Provided That

Do you know when to use a semicolon before **however**, or when to drop **though** at the end of a sentence? Master the tricky punctuation and placement of **contrast clauses** by navigating savage restaurant reviews, passive-aggressive roommate notes, and clumsy burglars.
> See a quick refresher inside!


Contrast Clauses: Although, However, and Though

Why did the time traveler arrive three centuries late? Master explaining *why* things happen by testing your knowledge of **adverb clauses of reason**, distinguishing **because vs. because of**, applying correct **punctuation rules**, and identifying **reason vs. time** contexts.
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Adverb Clauses of Reason: Because, Since, and As

When do you stop whisking? *Until* your arm goes numb, obviously. Master the timing of events by choosing the right **time conjunctions**, applying correct **verb tenses in future time clauses**, and sequencing **past events** properly.

> See a quick refresher inside!



Adverb Clauses of Time: When, Before, After, Until

Can you spot the error: "The news will **effect** they're decision"? Master the differences between **their/there/they're**, **affect/effect**, **your/you're**, and **its/it's** across 10 real-world scenarios.
> See a quick refresher inside!


Tricky Homophones: Their vs. There, Affect vs. Effect

Do you know when to say **an hour** but **a university**? Test yourself on **a/an sound rules**, **the vs. zero article**, and **first vs. second mention** across 14 everyday scenarios.
> See a quick refresher inside!


Articles: A, An, The & Zero Article

When using articles, there are a number of ways to communicate specific shades of meanings with articles. Related rules for proper names don't make things easier. To complicate things even further, there are other determiners occasionally taking the place of articles. For instance, _some_ and _no_ function like articles, but behave somewhat differently with uncountable nouns.

Answer the questions to check if you understand the nuances!


Articles Advanced

Articles are ubiquitous; _the_ is the most common word in English, accounting for 7% of all words.

The concept of definiteness is hard to grasp even for advanced learners who don't have articles in their first language. A spectacular example of such confusion is the occasion with Ivana Trump. She explained, "Yes, you know the outcome — 'The Donald' just slipped off the tongue, and now it seems to be making its ways to the political history books."

Take the challenge to find out if articles are easy for you!


Articles Basics

Ever wonder if you should say *a* cat or *the* cat, or whether to use *walk* or *walked*? Small grammar details make a massive difference in how natural your English sounds! Test your everyday accuracy with **definite and indefinite articles**, **regular plural nouns**, and **simple past and present verb tenses**.
> See a quick refresher inside!


The Big 3 for Vietnamese Speakers: Articles, Plurals, and Verb Tense

Do you "depend on" or "depend from" the weather forecast? Master some of the trickiest parts of English by practicing **dependent prepositions**, **articles for professions and generalisations**, and **pronouns for inanimate objects**.
> See a quick refresher inside!


Slavic Speakers' Top Errors: Articles, Prepositions, and Pronouns

Do you say "I am teacher" or "I am a teacher"? Master these tricky rules by testing your knowledge on **professions**, **abstract nouns**, **generalizations**, and **specific vs. general contexts**.
> See a quick refresher inside!


Articles Bootcamp for Romance Language Speakers: a, the, and Zero Article

Are you **good at** English grammar, or are you **afraid of** making mistakes? Master common collocations like **interested in**, **famous for**, and **proud of** by helping vampires, superheroes, and ghosts fix their funny resume and dating profile mistakes.
> See a quick refresher inside!


Basics. Adjective + Preposition: Good at and Afraid of

Ever wonder why we say a **cute brown dog** instead of a **brown cute dog**? Test your foundational grammar skills by practicing **adjective placement**, **basic adjective order**, and **plural invariance** across 12 engaging questions.
> See a quick refresher inside!


Basics. Basic Adjectives: Placement and Order

Ever wonder why we say "I always eat" but "I am always hungry"? Master the rules for **adverb placement before main verbs**, **placement after the verb "to be"**, and **word order in questions** across 10 fun scenarios.
> See a quick refresher inside!


Basics. Adverb Placement: Always, Usually, and Often

Do you know why a dog runs **fast** instead of **fastly**, or why a cat **always sleeps** instead of **sleeps always**? Test your knowledge on **regular -ly adverbs**, **irregular adverbs** like *well* and *hard*, and the **position of frequency adverbs** across 12 engaging questions.
> See a quick refresher inside!


Basics. Basic Adverbs: Form and Position

Do you know when to say **no food** instead of **none of the food**? Master these essential grammar rules as you test yourself on **basic quantifiers**, the **"of the" rule**, and the difference between **no and none**.
> See a quick refresher inside!


Quantifiers: All, Most, Some, and No

Test your **Basics: A/An and The: Basic Rules** skills with 11 questions at **easy** level.


Basic Rules for A, An, and The

Test your **Basics: The - Specific Uses** skills with 12 questions at **medium** level.


Specific Uses of the Definite Article

Test your **Basics: Zero Article - No Article Needed** skills with 12 questions at **medium** level.


The Zero Article: When No Article Is Needed

Are you ever tempted to say a movie is **as better as** the original instead of **as good as**? Master the art of making comparisons by testing your knowledge of **base adjectives**, **adverbs**, and **quantifiers** within the **as...as structure**.
> See a quick refresher inside!


Basics. As...As Comparisons: Adjectives and Adverbs

Do you know when to use *was* instead of *were*, or *does* instead of *do*? Master the most important irregular verbs in English by practicing **subject-verb agreement**, **present and past tenses**, and **question and negative forms**.
> See a quick refresher inside!


Basics. Present and Past Forms of Be, Do, and Have

Do you get confused when talking about two people or things? Master the rules for pairs by testing your knowledge of **pronouns**, **determiners**, and **paired conjunctions** like **either/or** and **neither/nor**.
> See a quick refresher inside!


Both, Either, and Neither

Test your **Basics: Can and Could - Ability and Permission** skills with 12 questions at **easy** level.


Basics: Can and Could - Ability and Permission

Is the soup *worse* or *more bad* than the appetizer? Master the rules of comparison by practicing **short adjectives ending in -er**, **multi-syllable adjectives with more**, and tricky **irregular forms** across 12 entertaining questions.
> See a quick refresher inside!


Basics. Comparative Adjectives: Short, Long, and Irregular Forms

Do you know when to use **more carefully** instead of **carefuller**, or when to say **better** instead of **more well**? Test your ability to compare actions by practicing **regular adverbs** with *more/most*, tricky **irregular adverbs**, and **flat adverbs** like *hard* and *fast*.
> See a quick refresher inside!


Basics. Comparative and Superlative Adverbs

Did you know that using two negative words in an English sentence is usually a grammatical mistake? Test your ability to choose between **nobody for people**, **nothing for things**, and **nowhere for places**, while learning to avoid tricky **double negatives**.
> See a quick refresher inside!


Basics. Negative Words: Nobody, Nothing, and Nowhere

Test your **Basics: Compound Nouns** skills with 11 questions at **medium** level.


Compound Nouns: Formation, Spacing, and Plurals

What would you do if you won the lottery or suddenly gained superpowers? Master expressing unlikely or imaginary scenarios by practicing **past simple if-clauses**, the **"If I were you" advice structure**, and formal **conditional inversions**.
> See a quick refresher inside!


Basics. Second Conditional: Hypothetical Situations

Will the world end if you snooze your alarm, or does it just happen every time? Test your ability to distinguish between absolute truths and future possibilities by mastering the **zero conditional**, the **first conditional**, and the tricky use of **unless vs. if**.
> See a quick refresher inside!


Basics. Zero and First Conditionals

Do you know when to use *so* instead of *because* to explain a chaotic morning? Connect your ideas smoothly by mastering **cause and effect**, **contrasting statements**, **adding information**, and **offering alternatives** using basic conjunctions.
> See a quick refresher inside!


Basics. Basic Conjunctions: And, But, Or, So, Because

Ever tried to tell a thrilling story but completely jumbled the timeline of events? Master your storytelling by testing your knowledge of **interrupted actions**, **simultaneous events**, and **logical sequencing** using **when**, **while**, **before**, and **after**.
> See a quick refresher inside!


Basics. Time Conjunctions: When, While, Before, and After

Test your **Basics: Countable and Uncountable Nouns 1** skills with 12 questions at **easy** level.


Countable and Uncountable Nouns: The Basics

Test your **Basics: Countable and Uncountable Nouns 2** skills with 11 questions at **medium** level.


Countable and Uncountable Nouns: Quantifiers and Meaning Shifts

Do you know when you should **do a favor** but **make a mistake**? Master the tricky differences between these two verbs by practicing **everyday collocations**, **household chores**, and **action vs. creation** phrases.
> See a quick refresher inside!


Basics. Do vs. Make: Basic Collocations

Did you know that you can hold an apple in *each* hand, but never in *every* hand? Master the subtle differences between these common quantifiers, including **rules for two items**, expressing **time and frequency**, and the correct use of **"each of" vs. "every one of"**.
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Each vs. Every: Understanding the Basics

Are you locking "every door" or "all the doors" before the zombies arrive? Master the differences between these tricky quantifiers by practicing **singular vs. plural noun pairings**, **determiner rules**, and **daily routine descriptions**.
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Basics. Every vs. All: Basic Contrast

Test your **Basics: For, Since, and Ago** skills with 12 questions at **easy** level.


Basics: For, Since, and Ago

Did you know you can use a present tense to talk about your weekend plans? Master the basics of using the **present continuous** for **future arrangements**, **fixed plans**, and **scheduled appointments**.
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Basics: Present Continuous for Future Arrangements

How can one small word mean so many different things? Master the most common uses of this versatile verb by practicing when it means to **arrive**, **become**, or **receive**.
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Basics. Basic Meanings of the Verb Get

Do you know why we "go to the gym" but "go on a diet"? Test your knowledge of everyday verb collocations by practicing **go to** for places, **go on** for trips, **go for** for noun activities, and **go -ing** for sports and leisure.
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Basics. Go to, Go on, Go for, and Go -ing Patterns

Test your **Basics: Going To: Plans and Predictions** skills with 12 questions at **easy** level.


Basics: Going To - Future Plans and Predictions

Do you know the difference between "Do you have?" and "Have you got?" Test your knowledge on expressing possession with **affirmative statements**, **negative forms**, and **questions** using both *have* and *have got*.
> See a quick refresher inside!


Basics. Have and Have Got for Possession

Did you know that you can *have* a dog, *have* a pizza, and *have* a nap all using the exact same verb? Master the different forms of this essential word by practicing **possession**, **meals**, and **daily activities**.
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Basics. The Verb Have: Possession, Activities, and Meals

Are you planning a trip or baking a cake and need to ask about the time? Master the structure of **asking about duration**, using the **auxiliary "does"**, and answering with **"it takes"** in this 12-question challenge.
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Basics. Asking About Duration: How Long Does It Take?

Test your **Basics: Imperatives - Commands and Instructions** skills with 12 questions at **easy** level.


Basic Imperatives: Commands and Instructions

Can you explain the difference between having *nothing* to eat and not having *anything* to eat? Master the rules of **indefinite pronouns** for people, things, and places, and learn how to correctly use **some**, **any**, **no**, and **every** compounds in positive and negative sentences.
> See a quick refresher inside!


Basics. Indefinite Pronouns: Somebody, Anything, and Nowhere

Test your **Basics: Indirect Questions** skills with 12 questions at **medium** level.


Forming Indirect Questions

Why do English speakers say "It is raining" instead of just "Is raining"? Master the dummy subject by practicing how to correctly use **"it" for time**, **weather conditions**, and **distance**.

> See a quick refresher inside!


Basics. Using 'It' for Time, Distance, and Weather

Does adding the letter "a" really change a sentence's entire meaning? Test your grasp of **countable vs. uncountable quantifiers** and learn to distinguish between **positive quantities** (*a little/a few*) and **negative shortages** (*little/few*).
> See a quick refresher inside!


A Little and A Few vs. Little and Few

Are you completely sure, or is it just a possibility? Learn how to accurately express uncertainty by mastering **affirmative and negative possibility**, **future predictions**, and the **modal + base verb rule**.
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Basics: May and Might - Expressing Possibility

Do you know why we say "much time" but "many hours"? Master the rules of quantity by choosing the correct words for **countable nouns**, **uncountable nouns**, and **versatile phrases** like *a lot of*.
> See a quick refresher inside!


Quantifiers: Much, Many, and A Lot Of

Test your **Basics: Must and Have To - Obligation** skills with 12 questions at **easy** level.


Must vs. Have To: Expressing Obligation

Test your **Basics: Mustn't vs. Don't Have To** skills with 10 questions at **medium** level.


Mustn't vs. Don't Have To

Do you know why we say "I **don't** know" but "I **haven't** seen it"? Test your ability to choose the correct **negative contractions** for the verbs **be**, **do**, and **have** in everyday situations.
> See a quick refresher inside!


Basics. Negative Contractions: Isn't, Haven't, and Don't

Test your **Basics: No, None, Any** skills with 12 questions at **medium** level.


Quantifiers: No, None, and Any

Are you guilty of accidentally using double negatives when talking about zero quantity? Test your ability to correctly apply **not any**, the determiner **no**, and the standalone pronoun **none** to express that absolutely nothing is left.
> See a quick refresher inside!


Basics. Negative Quantifiers: Not Any, No, and None

Do you know whether you should say "pick it up" or "pick up it"? Master your sentence structure by practicing **object pronouns after verbs and prepositions**, **double object placement**, and **separable phrasal verbs**.
> See a quick refresher inside!


Basics. Object Pronoun Placement

"I'll take the chocolate cupcake, and the strawberry cupcake too." Sounds a bit repetitive, right? Master the art of natural speech by substituting singular and plural countable nouns with **one** and **ones**, and learn how to avoid confusing them with pronouns like **it** or **them**.
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Basics. Avoiding Repetition with One and Ones

Are you good **at** grammar, or just good **with** guessing? Master these tricky small words by practicing **prepositions of transport**, **adjective combinations**, and **fixed expressions** like "by mistake" and "on purpose."
> See a quick refresher inside!


Basics. Common Prepositions: On, At, By, With, and About

Who stole the diamond, or rather, when *was it stolen*? Master how to shift the focus of your sentences by practicing the **present simple passive**, **past simple passive**, and **past continuous passive** across 12 engaging scenarios.
> See a quick refresher inside!


Basics. The Passive Voice: Present and Past

Test your **Basics: Past Continuous vs. Past Simple** skills with 15 questions at **easy** level.


Basics: Past Continuous vs. Past Simple

What were you doing at 8 PM last night? Master the art of describing past ongoing actions by practicing **interrupted actions**, **parallel events**, and **specific past times**.
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Basics: Past Continuous - Form and Use

Test your **Past Simple: Irregular Verbs** skills with 15 questions at **easy** level.


Basics: Past Simple - Irregular Verbs

Test your **Past Simple: Regular Verbs (worked/got/went)** skills with 15 questions at **easy** level.


Basics: Past Simple - Regular and Irregular Verbs

Test your **Verb "To Be": Past Forms (was/were)** skills with 15 questions at **easy** level.


Basics: Past Forms of the Verb "To Be": Was vs. Were

Do you know the difference between waking up and getting up? Master the vocabulary of everyday life by testing your knowledge of **morning routines**, **household chores**, **operating electronics**, and **running errands**.
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Basics. Common Phrasal Verbs for Daily Life

Do you know the difference between **looking for** your keys and **looking after** a pet? Test your knowledge of essential daily vocabulary, including verbs for **routines**, **clothing**, **electronics**, and **problem-solving**.
> See a quick refresher inside!


Basics. Introduction to Common Phrasal Verbs

Is that **your** snack, or is it **mine**? Master the basics of ownership by practicing the difference between **possessive adjectives** and **possessive pronouns** across 12 fun scenarios.
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Possessive Adjectives and Pronouns

Test your **Basics: Possessive 's and Of** skills with 12 questions at **easy** level.


Quotation Marks: US vs UK