Practice NAT questions with answers and explanations.
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The sentence describes a repeated habit in a finished past period.
The simple past is appropriate.
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The action continued for a duration before another past event.
The past perfect continuous emphasizes that ongoing earlier activity.
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The recent continuous activity explains a present result.
The present perfect continuous highlights duration and current effect.
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This is a real future condition using the first conditional pattern.
The main clause takes 'will' plus the base verb.
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Scientific facts and general truths use the simple present tense.
Therefore, 'moves' is correct.
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'Yet' in a negative sentence commonly refers to an unfinished action up to now.
The present perfect is the natural tense.
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The waiting continued for a period before a past event.
The past perfect continuous emphasizes the duration.
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The sentence refers to life experience without a finished past time.
The present perfect connects the experience to the present.
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Future time clauses after 'as soon as' normally use the simple present.
The future meaning is carried by the main clause.
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The train's departure occurred before another completed past action.
The earlier past event takes the past perfect.
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The main action will happen in the future after another future-completed action.
The main clause therefore uses 'will call.'
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The sentence describes an action in progress at a specific past time.
The past continuous tense expresses this meaning.
