to have done , having done 选哪个?为什么?_______ the home work,We went home.A.Having finished B.To have finished 选哪个? 为什么? 老师说 to have done , having done 表示发生在谓语动词之前 这2个都是之前 , 有什么

have done to have been done 和 to be done should ought to have done were to have done 造句, be believed to have done were able to have done should have done 可以换成 ought to have done嘛? have something done 与have sth.to be done 区别 pretend have done还是pretend to have done? have sth to be done/have sth done?为什么要用have anyting to be done? Ought to have done .must have done.should have done的区别 seem to do seem to have done to have done,to be done,to have been done,having done在用法上有什么区别? have done nothing but do 、done 、doing、to do? to have done 与having done 有什么区别 having done 和 to have done的区别having done 和 to have done 有什么区别? having done和to have done区别?我们老师说regret to have done,forget having done都表示完成. 关于英语非谓语问题非谓语doing having done to do to have done to be doing being done have been done to be done to have been doing done doing,having done,to do,to have done ,to be doing,being done,have been done,to be done,to have been doin