为什么有doing=to be done

为什么有doing=to be done to be done=doing? 怎么区分谓语动词,to do doing done 和to be doing to be done to have done 和beingdlonehaving done having been done?越具体越好 有分的=3=谢谢你们 非谓语中to be done =doing?非谓语中to be done =doing?=done sth request to be done=sth request doing有这样的主动表被动吗?类似于need to be done=need doing need doing 和 need to be done有什么区别? 有哪些词与need相似“+doing=+to be done” 要全! deserve doing=deserve to be done 这个短语是什么意思? 英语中,V+to be done都=V+doing? be worth doing 和be worth to be done 有什么区别? being done 和 be doing ;done ；doing ; be done ;to be done 的用法 请详细点 谢谢 Be said to do和be said to be doing和be said to have done有什么区别 deserve to lose为什么deserve用法不是加doing 或to be done to be doing和to have done为什么不能作状语 to be doing为什么不能非谓语动词作主语还有to having done remain to be done是否等于remain doing?need doing是否等于need to be done? require doing 与need doing那sth require to be done 与 sth need doing 有什么不同呢 to be done 与 to doing以前做了一道题,但记不太清了,里面大概好像是说某些时候to be done=to doing