Grammar Quiz

★ Modals of Speculation and Deduction

Use a modal to make a past deduction in the following sentence: ‘The train arrived late, so it ____________ have been a signal problem.’

A. must have

B. should have

C. could have

D. might have

Select your answer:
     


Preview next quiz:

Explain the difference between using ‘must have’ and ‘might have’ for past deductions.

A. The use of ‘must have’ suggests a higher level of certainty or confidence in the deduction, while ‘might have’ suggests a lower level of certainty or confidence.

B. The use of ‘must have’ and ‘might have’ is interchangeable in past deductions.

C. There is no difference between using ‘must have’ and ‘might have’ for past deductions.

D. Using ‘must have’ and ‘might have’ in past deductions depends on the speaker’s mood.


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