… pretend to do sth … pretend to be doing sth … pretend to have done sth的区别.
问题描述：
… pretend to do sth … pretend to be doing sth … pretend to have done sth的区别.
答
假装要去做某事，假装在做某事，假装已经做了某事。
答
1.假装（要）去做某事 If you pretend to know what you don't know,you'll only make a fool of yourself.不懂装懂就会闹笑话.2.假装在做某事Yet it needs,as a political matter,to pretendto be doing something....