过去式的肯定句,否定句,疑问句的结构

Question

如题所述

Answer 1

一般过去时的结构肯定句,否定句,疑问句。

例如：

1） 肯定句：

I went to the school library yesterday to borrow some books.

2） 否定句：

I didn’t go to the library yesterday.

3）疑问句：

Did you go to the school library yesterday?

简介

对事物作出否定判断的句子叫否定句。肯定句和否定句句式转换的原则是不能改变原意。转换的要点是否定词的运用：保持原意则加两个否定词；变成相反的意思则加一个否定词。另外要注意反问句也是一重否定。

方法：将肯定句改为双重否定句是只需在恰当的位置加入“不可能不”“不得不”“没有…不”“非…不可”等双重否定词。

Answer 2

1. be- was- were, 否定句： was not= wasn't, were not= weren't,一般疑问句把was, were提前到句首
如： I was at home yesterday.
I wasn't at home yesterday.
Were you at home yesterday?
Where were you yesterday?
2 行为动词： 主语+ 过去式
主语+ didn'g + 动词原形 （ 否定句）
Did+ 主语 + 动词原形 （ 一般疑问句）
如： I played football yesterday.
I didn't play football yesterday.
Did you play football yesterday.
What did you do yesterday?
3 情态动词：如： can
主语 + could +动词原形
主语+ couldn't + 动词原形
Could + 主语 + 动词原形
如： I could swim when I was ten.
I couldn't swim when I was ten.
Could you swim when you were ten?
what could you do when you were ten?
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