【7】否定句篇(课本148-149页)

陈述句变否定句:三大助动词+not

常见的助动词否定形式

be类(是):

am not ,isn't,aren't,wasn't,weren't

do类(没有意义)

don't(其它),didn't(过去),doesn't(主语是三单)

情态助动词类:

musn't 不准   won't将不会   can't不能  

shouldn't不应该   haven't还没有

1.句中有be动词时+not

I am not busy.

He is not here now.

2.谓语为实义动词时

do/did/does+not+动词原形

He doesn't like maths.

I don't drink cola.

The superman didn't answer

3.句中有情态动词时+not+动词原形

we haven't finished the report yet.

I won't go there anymore.

They can't go with us.

【句子写作练笔】

1.默写三大助动词的否定形式。

2.用所有助动词的否定形式造13句。

要求:

句意不一样,主语不一样,每句的动词不一样

*注意*动词的变形,名词单复数