to be done的用法to be done做为将要被做的意思时,在句子中做什么成分?比如 定语、状语

be sorry to have done的用法 to be done 和having been done的用法 being done 和 be doing ;done ；doing ; be done ;to be done 的用法 请详细点 谢谢 be used to have done是什么用法? to be done的意思 to do →to be done to be doing to have done →to have been done 动词不定式的用法,这几个怎么回事? be to的用法, 有没must to be done这种用法的?如果没,那为什么有need to be done? 英文want的用法want sth done与want sth to be done 的区别 seem to be done TO BE DONE怎么样 Be done 和to be done的区别 being done,done ,to be done的区别 to have done,to be done,to have been done,having done在用法上有什么区别? sb.be said to have done什么意思以及用法? have sth done/to be done/dong/do/to doRT,如何区分,用法,意思 sth need to be done的意思 关于 to be done 句型的语法