having done放句首的时候句子的时态如果是现在完成时的话，后面的句子不该出现动词的过去式该是一般式吧。可是我遇到一道题后面是done的形式啊。

having done的句子是什么时态的,having done 咋用~ having done的用法 having done放句首的时候句子的时态如果是现在完成时的话，后面的句子不该出现动词的过去式该是一般式吧。可是我遇到一道题后面是done的形式啊。 having done在句首的时候是什么意思?如何用?比如,having finished the homework,they . not having done 和 having not done 的区别 having been done和having done的区别rt having been done的用法 having done 、done、 being done、 having being done 的区别与详细用法 请问在高三英语完成句子中,句首什么时候时候用现在分词``过去分词``还有having done ``之类的, 英语非谓语动词区别having done和done表 示完成的时候这两个有什么区别 with +dong/done 不能加having done 举例能加having done 的词 done,tobe done,to have been done,to have done,having done,having been done的区别还有用法?救我……RT,还有啥时候用to be done,啥时候用todo?如There is a lot of work to do.为什么不用to be done?With a lot of work to do,he went ou 现在分词的完成式having done能用在将来时的句子中吗?请举例 Being done和having been.done的区别? to be done 和having been done的用法 having done 与done作后置定语时的区别 以Doing Done Having done 置句首的状语从句 十个 有没有imagine having done的结构?