not having done是什么时态
回答
爱扬教育
2022-03-20
not having done是非谓语动词中正确的用法,用作状语比较多，如
Not having heard from him,she decided to write another letter
have not done 是谓语动词完成时的否定形式,一般没有having not done 的。
Not having heard from him,she decided to write another letter
have not done 是谓语动词完成时的否定形式,一般没有having not done 的。
扩展资料
not having done 用在非谓语里，having not done 用在谓语里。如：
Not having finished my homework, my father asked me to stay at home and not to go our. 因为没有写完作业，我爸让我呆家里不许出去。
Because I haven't finished my homework, I had to stay at home.
having not done 这种形式本身是不能直接使用的。