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Standard English ConventionsHardVerb tense: past perfect

Standard English Conventions practice question

Which choice completes the text so that it conforms to the conventions of Standard English? By the time the train finally arrived, the passengers ____ on the cold platform for over an hour.

  1. A. wait
  2. B. are waiting
  3. C. had waitedCorrect
  4. D. will wait

Answer: C. had waited

The waiting happened before another past event (the train's arrival), so the past perfect 'had waited' is correct. 'By the time … had' is a reliable signal for the past perfect.

Why the other answers are wrong

A. wait
'Wait' is present tense, but 'By the time the train finally arrived' places the whole sentence in the past; you need a past form that shows the waiting came first.
B. are waiting
'Are waiting' describes something happening right now, but the waiting was already finished when the train arrived — that ordering calls for the past perfect.
D. will wait
'Will wait' points to the future, which contradicts 'By the time the train finally arrived'; the waiting had already been completed.

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