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情态动词+have done 用法及意义must have done need have done daren't have donecould never have done could have done

分类: 作业答案 • 2021-12-18 16:27:22
问题描述：

情态动词+have done 用法及意义
must have done need have done daren't have done
could never have done could have done

答

must have done 一定做过某事
need have done 本必须做，实际上没做

答

must have done 一定做了某事（对过去的一种肯定推测）
need have done 本需要做某事（但实际没做）（表轻微的责备）
daren't have done = didn't dare do (过去）不敢做某事
could never have done不可能做了某事（对过去的一种否定推测）
could have done 本可以做某事（但实际没做） （表轻微的责备)

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