关于过去分词啊.诶呦喂～有没有过去分词作状语放在句

关于过去分词啊.诶呦喂～有没有过去分词作状语放在句首表示动作已完成完成的用法的,就是Done sth.,………….还是只

1个回答

是having done的用法,比如,Having finished homework ,they wanted to sleep. 这里的主语是they,所以用的是having done.
还有一种是having been done,比如, Having been cleaned,the classroom looked very clear.这里由于主语是the classroon,所以用的是having done的被动.
不懂可以追问哦