be supposed to have done +时间怎么用

be supposed to have done +时间怎么用 be supposed to 和should have done be supposed to be done 和be supposed to have been done的区别 be supposed to do sth 与 be supposed to have done sth的区别 be supposed to do与was/were supposed to have done be supposed to do sth与should have done sth 有什么区别? have done/to be done 区分一下sth be supposed to do和sth be supposed to be done you were supposed to do,那么you were supposed to have done可以吗 have been done 和 to be done 在英语的非谓语中,ed,to do,ing,have done,to be done分别应该怎么用? have it to be done