will have been done怎么用

will have been done怎么用 will be done和will have done是什么情况could have been呢 the work _ by the time you get there.A.will have been done B.is done C.had been done D.would have done the work _ by the time you get there.A.will have been done B.is done C.had been done D.would have done must have been done must have done will+have done 将来完成时的问题..一般将来完成时的形式...我要问的就是下面的will+have+been和will+have+done..有何区别?will+have+been和will+have+been+done..又有何区别?will+have+done和will+have+been+done..又又有何区别?在造 have been done 和 to be done 将来完成时不是 shall（will）have+过去分词吗?可是will have been done 与will have done 有什么区别阿?怎么用阿? have been done 语法呢 Mr.Page will have been teaching for a total of forth years.在这句话中,我想知道为什么要用will have been teaching(will have been doing)这个时态,而不是will have teached(have been done) homework______on time will lead to better grades.a.be done b.done c.having done d.to have been done请问该如何选择,能不能选D? Homework ( )on time will lead to better gardes.A.done B.be done C.having done D.to have been done要说明原因哦。 has been doing have been done区别 being done,have been done和having done怎么分辨 will have done 还是will have did? 英语时态语态will have been done?有这种表述方式吗? can be done was done could be done must have been done will be done have been done用这些,每个造一个句子.上面的打错了can be donewas donecould be donemust have been donewill be donehave been done