小升初专项：陈述句变否定句.doc

陈述句变否定句
陈述句：是用来陈述一件事情或表示一种看法，可分为肯定句和否定句两种形式。
一、 变否定句：
1. 当谓语动词是be动词,am, is are或者过去时 was, were时，直接在这些词后面加not构成否定形式，即am not, is not=isn’t , are not=aren’t。如果句子里有some，在否定句中要变成any。and 变成 or。
Eg. She is a beautiful girl. (改为否定句)
- She isn’t a beautiful girl.
There are some students in Sun school. (改为否定句)
-There aren’t any students in Sun school.
2. 当句子中谓语动词是助动词will,情态动词can, could, should, must等时，直接在助动词和情态动词后加not 变为否定句。注意 will not = won’t, can not=can’t, must not =mustn’t 表示禁止。如果句子里有some，在否定句中要变成any。and 变成 or。
Eg .My family will go to Beijing and Qingdao next Sunday . (改为否定句)
-My family will not go to Beijing or Qingdao next Sunday.
They can run very fast. (改为否定句)
-They can’t run very fast.
3. Eg.谓语动词是行为动词而又没有助动词或情态动词时，必须在谓语动词前加助动词，一般现在时加助动词do ，第三人称单数加does，一般过去时加did，再和not构成否定结构。don't, doesn't, didn't后都用动词原形。如果句子里有some，在否定句中要变成any。and 变成 or。
Eg Tom flies kites in the playground. (改为否定句)
-Tom doesn’t fly kites in the playground.
We often play football after class. (改为否定句)
We don’t often play football after class.

练习
1） Mike is a student at Sun school. (改为否定句)
Mike ________ ________ a student at Sun school.
2） There are some apple juice in the fridge。（改为否定句）
There ________ ________ ________ apple juice in the fridge.
3) I am happy and excited to hear that good news. （改为否定句）
I am _____ ______ happy _____ excited to hear that good news.
4) She will go swimming next week. （改为否定句）
She _____ _____ go swimming next week.
5) My parents can cook meat with potatoes . （改为否定句）
My parents _______ _______ cook meat with potatoes.
6) You must do your homework now. （改为否定句）
You _______　_________ do your home work now.

7) Jill has lunch at school every day. (改为否定句)
Jill _____ _____ lunch at school every day.
8) The children had a good time at the party. (改为否定句)
The children ______ _____ a good time at the party.
9) Rose didn't watch TV this morning.（改为肯定句)
Rose ______ ______ this morning.
10) She does exercises at home in the evening.（改成否定句、） 
She ______ ______ exercises at home in the evening. 
11) He said something important at the meeting.（改为否定句）
He _____ ______ ______ important at the meeting. 
12) He reads English every morning.
He ______ ________ English every morning.
13) They can swim across the river.
They ________ ________ swim across the river.
14) I have some bread to eat.
I ________ __________ _________ bread to eat.
15) They are playing basketball.
They _______ _______ basketball.
16) The teachers will go to a meeting tomorrow.
The teachers ______ _______ go to a meeting tomorrow.
4