Help the exhausted detective finish typing his dramatic incident report by dragging the correct past-tense verbs into the blanks.
The suspect set the stolen diamonds gently on the velvet cushion. Then, he sat in the leather armchair to admire his sparkling loot. He had just laid his weary head back when the police alarms blared outside. The priceless jewels had lain there for mere seconds before we burst through the door and arrested him!
The suspect set the stolen diamonds gently on the velvet cushion.
"Set" is a transitive verb requiring a direct object ("the stolen diamonds"). "Sat" is the past tense of the intransitive verb "sit."
Then, he sat in the leather armchair to admire his sparkling loot.
"Sat" is the past tense of "sit," which is intransitive and does not take a direct object. He performs the action of sitting himself.
He had just laid his weary head back when the police alarms blared outside.
"Laid" is the past participle of the transitive verb "lay." It requires a direct object ("his weary head").
The priceless jewels had lain there for mere seconds before we burst through the door and arrested him!
"Lain" is the past participle of the intransitive verb "lie" (meaning to rest or recline). It does not take a direct object. "Laid" would be incorrect here because the jewels aren't placing an object down; they are simply resting.
Irregular verb
An irregular verb doesn't form its past tense and past participle by adding -ed — it changes shape in unpredictable ways: go → went → gone, eat → ate → eaten, put → put → put, take → took → taken. English has roughly 200 irregular verbs in common use, and many of them are the most frequently used verbs in the language (be, have, do, say, get, make, go, come).
Because the most-used verbs are irregular, you can't avoid them — they show up in every sentence. Memorising the three principal parts (base, past tense, past participle) of the top 100 is one of the highest-leverage moves at A2/B1.
Object
In grammar, an object is the entity a verb acts on. Tom studies grammar — grammar is the object. English distinguishes three types: a direct object (the thing acted on: Sam fed the dogs), an indirect object (the recipient: She sent him a present), and a prepositional object (introduced by a preposition: She is waiting for Lucy).
Knowing whether a verb takes an object — and which kind — is built into transitive and intransitive verb patterns. Pick the wrong pattern and the sentence either dangles or doubles up.
Past tense
The past tense is how English talks about events finished before now. It comes in four flavours: simple past (I walked) for completed events, past progressive (I was walking) for actions ongoing at a past time, past perfect (I had walked) for events before another past event, and past perfect progressive (I had been walking) for ongoing events leading up to a past point.
Choosing the right one is what makes past narratives clear instead of murky. When I arrived, she ate dinner is technically grammatical but means something different than had eaten (already done) or was eating (in progress when you arrived).
Transitive and intransitive verb
A transitive verb requires an object to complete its meaning (She broke the vase); an intransitive verb can't take a direct object (Rivers flow, Birds fly). Many verbs are ambitransitive — they work both ways with different meanings (She eats lunch / She eats slowly; The window broke / I broke the window).
This distinction matters because using a transitive verb without its object (She broke.) leaves the sentence dangling, and adding an object to an intransitive verb (She slept her bed) breaks it. Knowing each verb's pattern is essential for avoiding common A2/B1 mistakes.
Verb
A verb is a word that expresses an action, a state, or an occurrence — the engine of every English sentence. Most verbs have five forms: base (go), -s form (goes), past tense (went), past participle (gone), and -ing form (going). The verb be is the major exception with eight forms; modal verbs like can and must have fewer.
Verbs carry tense (when), aspect (how it unfolds), mood (the speaker's attitude), and voice (active vs passive). Mastering them is foundational — virtually every other grammar topic depends on getting verbs right.
Perfect tense
The perfect aspect marks an action as complete relative to a point in time. It's formed with have + past participle: I have eaten (present perfect), She had finished (past perfect), They will have arrived (future perfect). The perfect doesn't just say when — it says the action's completion is relevant to the time of reference.
The trickiest English-specific use is the present perfect: I have lived in Paris connects the past to now (you may still live there), while I lived in Paris doesn't. This connection is one of the biggest jumps for learners whose native language doesn't make the same distinction.
Humor
The Humor tag marks questions and challenges where the author has tried — subjectively, deliberately — to make the practice itself entertaining. Expect characters, scenarios, and storylines that play with absurdity: zombies, alien tourists, a chef's disaster, a roommate's complaint. The grammar rule is real; the wrapping isn't.
Humor matters because grammar drills are forgettable. Tying a rule to a story your brain wants to keep makes it stick. Filter by Humor when motivation is what you're short on, not study time.
B2 | Upper Intermediate
B2 is the upper-intermediate level in the CEFR framework, sitting between B1 and C1. At B2 you can read editorials, follow most TED talks without subtitles, and hold extended conversations on abstract topics — including topics outside your everyday life.
Grammatically, B2 means flexible control of mixed conditionals, passive voice across tenses, reported speech with proper backshifting, and participle clauses. B2 is the standard target for university entrance exams (IELTS 5.5–6.5, TOEFL 87–109) and most skilled-migration thresholds — knowing whether you're there shapes your study plan.
Difficulty: Medium
The Medium difficulty tag marks questions and challenges in the middle of the difficulty range — typically suitable for A2 to B1 learners. Expect a single rule with realistic distractors, longer sentences, and contexts where you have to think before answering rather than reading off the obvious choice.
Filter by Medium when you're past the absolute basics and ready to consolidate. It's the level where most lasting progress happens — easy enough that you can finish without exhausting concentration, hard enough that getting it right means you've actually understood.