to have done

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to have done
有这个东西吗有的话怎么用?

当然有,它是不定式的完成时态.
例证：She is said to have gone to London.
用法一般就是在必须带不定式的动词后面表示已经完成的时态.

have done/to be done have done to to have done meant to have done done,tobe done,to have been done,to have done,having done,ha have been done 和 to be done were to have done 造句, the 序数词 to have done 不定式 to have done 举例 have it to be done should ought to have done to have done 目的状语