they must have lost your letter in the post.They must have lost your letter in the post改被动语态your letter must have been lost by them in the post 1、有MUST的是什么时态.2、MUST后不是直接跟动词原型吗.

They must have lost your letter in the post 怎么变被动语态 把We must sell allthese goods.they must have lost your letter in the post.改为被动语态. 把We must sell allthese goods.they must have lost your letter in the post.改为被动语态. they must have lost your letter in the post.They must have lost your letter in the post改被动语态your letter must have been lost by them in the post 1、有MUST的是什么时态.2、MUST后不是直接跟动词原型吗. He can't find his key.He ---------- them.A.must lost B.must have been lost C.must have lost i must have lost my key~不用have行不? Where is my keys?I___________it.A.might lose B.would have lost C.should have lost D.must have lost Where is my pen?I_____it A.might lose B.would have lost C.should have lost D.must have lost I must have lost them probably about half way through What we have lost somewhere must be found somewhere else. have I found the lost child 还是 have I find the lost child The police still have I found the lost child,but they’re doing all they .A.can B.may C.must D.should (四川 20’)这题选 A 我明白.但是题干中警察让我找孩子为什么用 They must have finished their homework,_______. You must pay for the library book if you____itA lost B have lost Cwill lose Dhad lost Where is my book .I______ it.A.might lose B.would have lost C.should have lost D.must have lost 选什么 为什么 Where is my pen?I_____it.（b）A.should have lost B.must have lost C.would have lost D.might lose为什么不是d？ What must they do?They must have a hoilday.标What must they do?They must have a hoilday.标准译文是: They are _____(China) and they have lost ______(they,job). When they put they must have When they put the tables inthey must have taken the controls out.