一、有be动词（am, is, are）的，可以在这些单词后面直接加not. 注意缩写 is not= isn’t are not= aren’t
二、有情态动词（can, would）的，可以在这些单词后面直接加not.
注意缩写 can not=can’t would not=wouldn’t
三、没以上那些单词只有动词的，像walk, swim, run, clean, eat, drink, sleep 等等，需要在动词前加do, 然后再加not, 即 don’t.
例子：I am a nurse. I am not a nurse.
1、He is my father.
He ____ _____ my father.
2、I’d like a pie.
I ________ _______ like a pie.
3、This is a book.
This _______ a book.
4、Tim and Tom have two robots.
Tim and Tom ________ have two robots.
5、Those are his robots.
Those ______ _______ his robots.
6、Sam can swim.
Sam ______ _______ swim.
7、Stand up.
__________ stand up.
8、These are my crayons.
These __________my crayons.
9、There is a box on the desk.
There ______ ______ a box on the desk.
10、I can see a boat.
I __________ see a boat.
11、Tim would like to sleep.
Tim _________ like to sleep.
12、I like apples.
I ______ ______like apples.
综合练习
1、I _________(not) his sister.
2、__________(not) clean the blackboard.
3、I __________(not) have a book.
4、These ___________(not) my rubbers.
5、The door __________(not) open.
6、__________(not) have a look.
7、I’d like an ice cream. (改否定句)
8、She can skate. (改否定句)下载本文
