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they must have lost your letter in the post.

来源：学生作业帮 编辑：神马作文网作业帮 分类：英语作业 时间：2024/11/10 10:45:15
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.
must have done sth.对过去情况的推测,本身有可能是过去时,也有可能是完成时.意为：肯定
如：
He has been to Beijing .-----He must have been to Beijing.(完成时）
It rained last night----It must have rained last night (过去时）
have 也是动词原形.
they must have lost your letter in the post. They must have lost your letter in the post 怎么变被动语态 You letter must have been lost by them in the post. 的汉语是什么? 把We must sell allthese goods.they must have lost your letter should this letter have crossed in the post with your reply You can put your letter in the ______.A.post box B.litter bi the letter _ _(must post) at once 被动语态 remember to post the letter on your way home We can post a letter in the theater.翻译 i will go to the post office.Do you have a letter （to post） A:I'm going to the post office,for I have a letter to post B They lost ( ) way in the park.