English grammer

来源：百度知道 编辑：UC知道 时间：2024/06/24 14:53:23
1. must be 是什么语法??
2. You needn't sweep the floor now.
The floor needn't _____ _______ by you now.
3. Bob has given a new pen to me.这是什么句子?语法成分是什么??
A new pen ___ ____ ____to me by Bob.

注意`~
"_____"只是代表横线,不是规定的字数哦
谢谢拉``

1。有两种用途，1）must的被动，举例：you must close the door. (主动) the door must be closed by you.(被动)
2）must情态动词加be动词，表示一般系表结构的肯定状态，如：you are bob.(一般系表结构)
you must be bob.（上句的强调，肯定）两句的翻译如下：你是bob,你一定是bob
2.be swept 是情态动词的被动用发
3.has been given 现在完成时的被动

be swept
has been given
bob主语，has given谓语，a new pen宾语，to me宾补

1 情态动词 没什么特殊语法
2 to be swept
3 has been given也可 is given也可
被动语句 现在完成时

must be 一定 情态动词加be动词原型

2. be swept

3. has been given
现在完成时态， 主语是物体 所以是has been+动词过去分词

1. have to be done
e.g. the floor must be cleaned

2. the floor needn't be swept by you now
3. a new pen was given to me by bob