Question:
She _____ him to translate the document into French because she herself cannot speak French.
-
A.
couldn’t have helped -
B.
shouldn’t have helped -
C.
needn’t have helped -
D.
mustn’t have helped
Reference explanation:
Correct answer: A
Needn’t have PII: didn’t have to do anything but did
Couldn’t have PII: could not have done (not sure)
Should have PII: should have done something but didn’t
Do not use mustn’t have PII, but can’t have PII: certainly could not do anything in the past.
She couldn’t help him translate the document into French because she didn’t speak French herself.
→ Choose answer A
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