done共0篇

to have done用法to have done是不定式的完成结构。to have done有三种用法:表示...
mustnt have done什么意思mustn't have done可意为“本不必”,即已经做了某事,而实际上不必要。...
been和done的区别been是be的过去分词;done是do的过去分词。常见的用法是have don...
情态动词+have done的用法should、would、could、need加have done时,肯定形式下的意思,都...
was been done是什么时态没有was been done这种形式。“was done”是一般过去时的被动语态...