过去完成时had done的非谓语是啥。。

Question

如题所述

Answer 1

had been done
to have done
having done
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Answer 2

to have done,
having done

Answer 3

having done追问

那非谓语啥时候用todo。啥时候用doing呢

那非谓语啥时候用todo。啥时候用doing呢

追答

一方面，考虑二者意味上的区别，to do 带有趋向性；二是考虑动词搭配。