pretend to be doing 的被动是什么?如题它的被动形式是什么?

pretend to be doing pretend to be done是什么时态?pretend to be doing pretend to have done pretend to have been done呢? pretend的用法为什么有的时候用pretend to be doing,而有是却用pretend to do 比如：pretend to be reading,pretend to sleep … pretend to do sth … pretend to be doing sth … pretend to have done sth的区别. … pretend to do sth … pretend to be doing sth … pretend to have done sth 的区别是什么、 pretend to do 和pretend to be doing有什么区别. pretend to do sth 和pretend to be doing sth造句 pretend doing 还是to do to be doing 和 doing 有什么不同?如果to be doing表示将来 那么pretend to be doing作何解释? pretend to do 和pretend doing 有啥区别 pretend to be asleep和pretend to be sleeping pretend to be doing 的被动是什么?如题它的被动形式是什么? 英语翻译 Pretend to be upset pretend to be not care Pretend to be culture是什么意思? pretend to do 和pretend to be doing 有什么区别?When the father came home,the naughty boy pretended___ his homework?A to do B to be doing C doing D being done 应该选哪个呢? pretend to read 与pretend to be reading区别 o you have to pretend to be