pep小学英语毕业总复习（二）*

1、肯定句：是指用肯定的语气来陈述的句子，如

I’m a student.  She is a doctor.  He works in a hospital. 

There are four fans in our classroom.

I’m going to buy a comic book tonight. He will eat lunch at 12:00.

I’m reading a book.  They are swimming.

I watched TV yesterday evening.

2、否定句：含有否定词或表示否定意义词的句子，如：

I’m not a student.  She is not (isn’t) a doctor. 

He does not (doesn’t) work in a hospital.

There are not four fans in our classroom.

I’m not going to buy a comic book tonight.

He will not (won’t) eat lunch at 12:00.

I’m not reading a book.  They are not (aren’t) swimming.

I did not (didn’t) watch TV yesterday evening.

☆注意☆ 小结：否定句主要是在肯定句的基础上加上了否定词 “not”。有动词be的句子则“not”加在be后面，可缩写成“isn’t，aren’t”，但am not 一般都分开写。没有动词be的句子则要先在主要动词的前面加上一个助动词（do，does，did），然后在它后面加上“not”，你也可以把它们缩写在一起如“don’t , doesn’t , didn’t ）。这三个助动词要根据人称和时态来选择，其中“does”只用于一般现在时主语是第三人称单数的情况，而“did”只用于一般过去时，不论主语是什么人称和数，都用“did” 。

3、一般疑问句：是指询问事实的句子，此类句子必须用“yes”，或“no”来回答。如：Are you a student? Yes, I am / No, I’m not. 

Is she a doctor? Yes, she is. / No, she isn’t. 

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