请问,在非谓语动词中doing和having done如何区分?

请问,在非谓语动词中doing和having done如何区分? 非谓语动词doing/having done/done区别 having done 与done在非谓语动词中区别 having been done ,having done 这个非谓语动词在句子中不可以充当什么成分 在做非谓语动词时,碰见being done 和done 怎样区分? 非谓语动词中being done ,done,having been done,have done 有什么区别 关于非谓语动词的语法选择题,句子第一个词,怎么区分是用doing,having done,being done,还是-e 非谓语动词中,现在分词和动名词有什么区别?什么时候用having done? 在非谓语题目中,having been done 和done 的区别是什么啊? 英语非谓语动词中有having been done,那有没having done形式? 非谓语动词having done的疑问 keep是不是在非谓语动词中有keep sb done 和keep sb doing的用法