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.

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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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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.

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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".

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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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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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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.

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Do you know exactly when to use "I" instead of "me", or "my" instead of "mine"? Master the complete first-person pronoun system by practicing subject pronouns, object pronouns, and possessive adjectives and pronouns across hilarious everyday scenarios.

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Do you know when to use "I" instead of "me" in a sentence? Master the basics of subject pronouns that perform actions and object pronouns that receive them, all while navigating fun scenarios with secret agents, wizards, and aliens.

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Do you know why we say she asked where I went instead of she asked where did I go? Master the tricky word order of reported Wh- and Yes/No questions, and learn how to properly format positive and negative reported commands.

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Do you know how to correctly report someone saying "I will do it tomorrow"? Test your ability to apply tense backshifting, change time and place markers, and choose correctly between said and told.

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Test your Basics: Subject vs. Object Questions skills with 12 questions at medium level.

Why do we say "I want you to leave" instead of "I want that you leave"? Master the verb + object + to infinitive pattern, including common reporting verbs and negative infinitives, to give commands and express expectations perfectly.

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Did the dog eat your essay, or did your essay eat the dog? Master the foundational Subject-Verb-Object (SVO) pattern by helping aliens, detectives, and students build basic English sentences correctly.

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The challenge is about common questions in English: simple present and past questions, "why + negative" questions, questions with "who" as the subject, and questions with "who" and "whom" as the object.

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This topic covers various aspects of pronouns and possessives in English. It includes personal pronouns for people and things, possessive forms to show ownership or relationships, forming questions with possessives, and reflexive pronouns.

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Master more complex common question types, such as "Who...? / What...? / Where...? / Which...?" with prepositions at the end, "What + noun" and "Which + noun" questions, questions about duration, and complex sentence questions.

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Did you know that a single comma can turn a harmless sentence into a cannibalistic threat? Test your punctuation skills by exploring restrictive vs. non-restrictive relative clauses, essential vs. non-essential information, and the vocative comma for direct address.

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Do you tell someone news or say news to them? Master essential communication collocations including say vs. tell distinctions, advice patterns, promise expressions, and argument vocabulary through 23 interactive questions.

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Are you constantly second-guessing whether to use affect or effect? Master these tricky distinctions by practicing countable vs. uncountable determiners, confusing verb pairs like lie/lay, and similar-sounding vocabulary.

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Would you know exactly how to respond if your friend announced they were bringing fifteen tarantulas to a dinner party? Master conversational English by practicing echo questions for surprise, tags for indefinite pronouns, and exceptions like "I am" and "Let's".

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Did you cut your own hair, or did you have it cut? Master the art of delegating tasks by practicing the causative structure, focusing on the have/get something done pattern across various verb tenses.

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Struggling to decide between "who" and "whom" in formal writing? Master the intricacies of object relative pronouns (whom), possessive relative pronouns (whose), and relative adverbs (where, when, why) in this engaging 11-question challenge.

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Did the suspect deny to eat or deny eating the last slice of pizza? Master the tricky grammatical structures of reported speech by testing yourself on verbs followed by gerunds, verbs followed by infinitives, object plus infinitive patterns, and that-clauses.

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Did you hear the floorboards creak, or did you hear them creaking? Master the rules for using the bare infinitive for completed actions and the -ing form for actions in progress after common verbs of perception.

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Would you say "Hey boss, what's good?" to the CEO on your first day? Master your professional tone by practicing formal email greetings, polite requests, and workplace apologies.

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Do you know why we ask "Who ate the cake?" instead of "Who did eat the cake?" Master the tricky rules of English interrogatives by testing yourself on subject questions, polite indirect questions, tag questions, and dangling prepositions.

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Do you know why we say "Who stole the cheese?" instead of "Who did steal the cheese?" Test your grammar skills by practicing subject vs. object questions, polite indirect questions, tricky question tags, and negative questions across 13 engaging scenarios.

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All English verbs are divided into three big groups of transitive, intransitive and linking verbs. The belonging to one of these groups influences the choice of the object the verb may be followed by: direct, indirect, indirect without a preposition, prepositional object or the complex object. Another reason to know about "transitivity/intransitivity" of a verb is to be able to use the verb in the passive voice. In addition, some verbs such as get, grow, keep, look, and alike, can be also link verbs that will strongly influence the meaning of a sentence.

Master transitive vs. intransitive verbs and avoid common errors like discuss about or enter into. Stop adding unnecessary prepositions with high-impact verbs like discuss, reach, enter, and contact!

Practice using verbs that take an object + infinitive pattern, such as want, ask, tell, allow, and encourage. Learn when to use to + verb after the object and which verbs require a bare infinitive instead.

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Did you know that translating literally from your native language can completely change your meaning in English? Master these tricky areas by practicing verb-object word order, dependent prepositions, and common false friends like actual vs. current.

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Do you say discuss the plan or discuss about the plan? Test your ability to spot and remove unnecessary words by mastering transitive verbs without prepositions, avoiding double subjects, and dropping extra pronouns in relative clauses across 14 questions.

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Are you making subtle grammar mistakes in your daily standup notes and Slack messages? Master professional communication by fixing errors with company names, "one of the" phrases, "there is" vs. "there are", and tricky I/me/myself pronouns.

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Do you ever wonder if you should "discuss the menu" or "discuss about the menu"? Master professional communication by fixing common mistakes with verbs that take no preposition, matching nouns with specific prepositions, and choosing the right forms of regarding and reply to.

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Ever type so fast on Slack or Teams that you leave out an essential word? Test your ability to spot and fix missing auxiliary verbs, dropped pronouns, and omitted prepositions in everyday professional messages.

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