关于having done是不是只要动作在谓语动作之前发生,就一定要用having done的形式?有什么特例吗?

关于having done是不是只要动作在谓语动作之前发生,就一定要用having done的形式?有什么特例吗? 有没有have to been done有没有这种结构啊,那个什么动作发生在谓语之前的是什么啊,是不是还有个having done after having done与after doing 区别 新概念英语2第20课中说after having done 是因为after后的宾语动名词表示动作发生在谓语动词之后~但不是只要在after后的动名词都发生在谓语动词后吗? 请问不定式和having done 还有to have done 是不是不能做伴随状语? This done,we went home.这里过去分词done是不是表示动作 not having done 还是having not done? never having done还是having never done having done 用法（1）having done充当状语时,是否只用于时间状语从句 (2)having done做非谓语动词时是否表示在此动作在主句谓语动词之前发生 关于having been done这个语法是不是非谓语?如果主句与从句主语相同,是不是省略从句主语 可以由have benn down变成having been done 或者独立主格也可以这么变?还有哪种情况可以用?This done,we went home.= having done的用法 关于非谓语形式的问题having worked here for three years,he knows well about the factory.能不能改成working here for three years?是不是有for+时间的时候一定要用having done,而不能用doing? doing having done being done having been done 造句! 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 不定式的完成时 和 分词的完成时有什么区别?老师说to have done和having done都表示动作已经完成,动作发生在谓语动词的动作之前.完全搞不明白他们有什么区别!to have done 和 having done 搞来搞去就 to have been done 和having been done他们都是非谓语动词,都是发生在谓语动词的动作之前,被动.分别什么时候用? 关于非谓语动词我问的比较简单,就是问我记住的对不对,哎,老师讲的有点忘记了加to的代表是还未发生:to do （主动）to be done（被动）doing （正在发生,主动）having done（在主句发生之前的动作 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.,………….还是只能是Having done sth.,…………?有的话给点例句,不要过去分词的用法!看清了 关于英语现在完成时方面的.Having turned off the TV set,he began to go over his lessons.=After turning off the TV set,he began to go over his lessons.第一句话为什么用having done?动作是在began之前不是应该用过去完成时