to be doing为什么不能非谓语动词作主语还有to having done

to be doing为什么不能非谓语动词作主语还有to having done 非谓语中to be done =doing?非谓语中to be done =doing?=done doing 和 be doing 哪个算非谓语?非谓语都包括哪些形式呢? 关于notice sb doing sthnotice sb doing sth的doing是非谓语动词吗?现在分词作非谓语动词时为什么前面不用加be动词吗? 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 非谓语动词形式1.The problem remains__in the future.为什么这里要填to be seen?2.He had a hard time___(pass)the exam为什么不能填to pass而是passing?3.Do you mind me smoking here?mind什么时候用to do或doing?4.The story had us __ 非谓语动词被动为什么不用be 现在进行时态谓语是be+doing,但doing又属于非谓语动词,咋能作谓语,矛盾啊 非谓语动词,doing to do done 的用法区别 非谓语动词,to do doing done的区别 to do表示将来,doing表示现在,done表示未来,那是不是无论非谓语动词做任何句子成分都要考虑这一点呢?如果是 那为什么to be done表示过去? 【非谓语选择题】what will andrew be doing in the fall?“What will Andrew be doing in the fall?”“（　）maths at a private school.“A.To teachB.TeachingC.To be teachingD.Be teaching但我选A,这不是将来时嘛?为什么不选A? how about going to France for our next holiday?中为什么没be动词,打算做某事不是be going to句型吗?句型：how about doing sth，doing是现在分词不能单独构成谓语，那这句话谓语是什么？主语是被省略了吗？ 非谓语.求讲解.（ ）map dated back to about 3000B.C.A.The oldest knownB.Known as the oldestC.It was the oldest knownD.Known to be the oldest为什么不能选BC? to be doing和to have done为什么不能作状语 非谓语动词句型非谓语动词都有哪些句型?（+do,+to do,+doing)最好全一些, 【非谓语语法】 she was glad to see her children to be taken care of为什么用t 非谓语动词单选It's necessary to be prepared for a job interview.___the answers ready will be of great help问什么选having不能选having had非谓语动词having done啊可以做主语的，为什么