to have been done 怎么用
问题描述：
to have been done 怎么用
答
to do 不定式的一般式 to be done 一般是的被动 to be doing 一般式的进行时 to have done 不定式的完成式 to have been done 不定式完成式的被动
to have been done 怎么用
to do 不定式的一般式 to be done 一般是的被动 to be doing 一般式的进行时 to have done 不定式的完成式 to have been done 不定式完成式的被动