have been done我一直不大理解,这个句式是用在什么地方,什么时候能用?That wo
have been done我一直不大理解,这个句式是用在什么地方,什么时候能用?That wo
have been done我一直不大理解,这个句式是用在什么地方,什么时候能用?
That would have helped my confidence too,and I would have been more motivated.这句话第一句是现在完成时have加过去分词对吗?第二句也是现在完成时?been在这里是干嘛的?有人说是被动语态,但被动语态不是be加过去分词吗?