陈述句
一、 陈述句的概念
陈述句是用于陈述事实和观点的句子。陈述句包括肯定结构和否定结构，句末用句号。如：
This is a desk. (肯定结构)
He can sing and dance. (肯定结构)
He doesn’t have a computer. (否定结构)
There aren’t any pictures. (否定结构)
二、 肯定句变否定句的基本方法
1. be动词的否定式
be 动词根据不同的人称和时态有不同的形式，在一般现在时中是am , is , are可用作联系动词，构成否定式时，一律在其后面加否定词not.
He is reading. --- He is not reading. They are from China. --- They are not from China.
2. 情态动词的否定式
情态动词的否定式是在其后面直接加not. 如：
I can swim. --- I can’t swim. He can dance. --- He can’t dance.
You should go to school at seven. --- You shouldn’t go to school at seven.
3. 实义动词的否定句
实义动词变否定句时，要借助助动词do , does，在一般现在时中用do或者does其句子结构为：主语+ don’t / doesn’t + 动词原形+其它
例如：
I like pop music. --- I don’t like pop music.
He likes running. --- He doesn’t like running.
She does her homework at home. --- She doesn’t do her homework at home.
典型例题：
1. My sister ______ moon cakes with eggs in them.
A. don’t like B. doesn’t like C. doesn’t likes D. doesn’t liking
2. He often does his homework at home. 变为否定句
_______________________________________________________________
3 . He doesn’t goes to the zoo every Sunday.(改错题) （ ）_________
A B C D
4. Does Li Lei likes sports （判断正误）( )
开心练习：
一、 将下列句子变为否定句，每空一词。
1． This is a desk.
This ________ a desk.
2. Grandpa tells stories to us every evening.
Grandpa ________ ________ stories to us every evening.
3. He can draw pictures.
He _______ draw pictures.
4. He has a nice watch.
He _______ _______ a nice watch.
5. They do a lot of homework at school.
They ________ ________ a lot of homework at school.
6. You must play football here.
You ________ play football here.
7. They are having an English class.
They _________ _________ an English class.
8. Peter goes to the zoo once a year.
Peter _________ _________ to the zoo once a year.
开心突破：
二、 下面各句四处划线部分有一处是错误的，请指出并改正。
1. He doesn’t the homework every day. ( )
A B C D
2. He doesn’t have some rice for supper. ( )
A B C D
3. This coat are red. That coat is blue. ( )
A B C D
4. He don’t go to school yesterday. ( )
A B C D
三、连词成句。
1. playing , like , I , football
_______________________________________________________
’t , any , wall , the , pictures , there , on
_______________________________________________________
3. waiting , bus , for , the , we , are
_______________________________________________________
4. much , the , how , shirt , is
_______________________________________________________
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