Question

His work _____ have been completed; otherwise, he wouldn’t be enjoying himself on the beach. ..

His work _____ have been completed; otherwise, he wouldn’t be enjoying himself on the beach. A．should B．shouldn’t C．can’t D．must

Answer 1

D

试题分析：考察情态动词用法。Should have done本应该做某事，实际上却未做；shouldn’t have done本不应该做某事，实际上却做了。Can’t have done不可能做了某事；must have done一定做了某事；本句的关键在于otherwise后面的句意。句意：他肯定完成了他的工作，要不然，他不会在海滩上玩得那么开心的。根据句意说明这是对过去发生的事情的有把握的肯定推测。故D正确。 点评：本题是高考必考考点，一定要牢记句型意思。must have done过去肯定做了某事。should have done 本应该做而实际未做。can’t have done 过去不可能做了某事；shouldn’t have done 本不应该做而实际做了。 need have done 本有必要做某事；needn’t have done 本没有必要做某事；注意没有 mustn’t have done的形式。