3 Be动词的否定/提问/回答

Be动词的否定

在 am , is , are , was , were 后面加not.

缩写式：am not , isn’t , aren’t , wasn’t , weren’t

 

1.   The man isn’t back. 主系表结构

2.   I am not back.  be动词根据主语决定时态，单复数

3.   They aren’t back.

4.   He wasn’t back.

5.   They weren’t back.

 

Be动词提问和回答

Is he a teacher ?

Yes , he is. / No , he isn’t.

Are you a teacher?

Yes , I am / No , I am not.

Were they teachers?

Yes , they were . / No , they weren’t.

 

Be动词的练习

1.   他是医生吗？(doctor)

Is he a doctor ?

2.   他们昨天在教室吗？（yesterday , classroom）

Were they in the classroom yesterday ?   通常时间放最后，地点在时间前面

3.   他们昨天不在教室。

They weren’t in the classroom yesterday.

Be动词的否定/提问/回答

 

Be动词的否定

在 am , is , are , was , were 后面加not.

缩写式：am not , isn’t , aren’t , wasn’t , weren’t

 

1.   The man isn’t back. 主系表结构

2.   I am not back.  be动词根据主语决定时态，单复数

3.   They aren’t back.

4.   He wasn’t back.

5.   They weren’t back.

 

Be动词提问和回答

Is he a teacher ?

Yes , he is. / No , he isn’t.

Are you a teacher?

Yes , I am / No , I am not.

Were they teachers?

Yes , they were . / No , they weren’t.

 

Be动词的练习

1.   他是医生吗？(doctor)

Is he a doctor ?

2.   他们昨天在教室吗？（yesterday , classroom）

Were they in the classroom yesterday ?

3.   他们昨天不在教室。

They weren’t in the classroom yesterday.