“Why are you so sure that Ann didn’t commit the crime she’s been accused of committing
来源 :焚题库 2021-09-08
中单选题 “Why are you so sure that Ann didn’t commit the crime she’s been accused of committing?”
“She mustn’t have committed that crime because I was with her,and we were out of town on that day.”
“She mustn’t have committed that crime because I was with her,and we were out of town on that day.”
A.may not have committed
B.wasn’t supposed to commit
C.might not have committed
D.couldn’t have committed
参考答案：D
答案解析：这段话的意思是：“你为什么如此确定Ann没有犯她被控诉的那宗罪？ ”“她不可能犯罪，因为那天她跟我在一起，我们一块出城了。”此题考查情态动词的用法。题干中用了mustn’t have done的形式，这种形式不存在。must have done表示对过去某事的肯定猜测，过去肯定做了某事，其否定或疑问形式须用can (could)来表示。may / might not have done表示对过去事实的不确定推测，表示“可能不会”，根据后文内容可知此句为肯定的否定推测，所以排除A、C项；选项B表示“不应该”；couldn’t have done表示对过去所发生事情的否定推测，表示“过去不可能做了某事”。答案为D。
