英语语法：疑问句中介词在句首或句尾的用法

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疑问代词

who(m), whose, what, which称为疑问代词，用于构成特殊疑问句。

5）疑问代词与介词的连用

如果谓语动词为“动词+介词”的介词动词，介词不能提到疑问句句首。例如：

What did they look at?

他们看到什么？

结构分析： they是主语，did look at是谓语，过去一般时，what是疑问代词，作宾语，变成提问句时，需要移到句首。

What good idea did you come up with?

你想到什么好主意？

结构分析： you是主语，did come up with是谓语，过去一般时，what good idea是疑问代词词组，作宾语，变成提问句时，需要移到句首。

但是，如果句中“介词+名词”起状语作用，非介词动词词组成部分，那么介词可以放在句末，也可能提到句首。例如：

他们和谁去公园?

With whom did they go to the park？

Who(m) did they go to the park with?

结构分析：they是主语，did go是谓语，过去一般时，to the park是目的状语，with whom是状语。

他们用什么割草?

With what did they cut grass?

What did they cut grass with?

结构分析：they是主语，did cut是谓语，过去一般时，grass是谓语，with what是状语。

下列表达习惯把介词置于句末:

What is the weather like today?

今天天气怎么样?

What is Sally up to now?

萨利现在在干什么?

What are you here for?

你来这儿干什么?

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20211001作业：1. 翻译，并进行句子结构、时态分析。

Could you show me a skirt? A green one, I mean.

英语外刊，精读练习：1.句子结构、时态等分析；2.将英文译成中文。

Nigeria’s preparation for the Qatar 2022 World Cup qualifier against Central African Republic will begin with the arrival of players to the Eagles’ camp, which will open on Monday, next week.【The Guardian】