把肯定句改成否定句分以下情况：

1、句中有be动词的，在be动词后加not；

2、句中有情态动词的（can ,should，must ，would），在情态动词

后面加not；

3、句中没有be动词和情态动词的，在动词前加don’t或doesn’t ；

①句中动词为原形的，加don’t .如：I like apples. →I do n’t like apples.

②句中动词为三单式的，加doesn’t，并将三单式的动词还原成

原形。如：He likes apples.→ He does n’t like apples.

③时态为过去时的,要加didn’t 而且动词过去式要改为原形,

例:I went to school yesterday .→I didn’t go to school yesterday .

4.肯定句中的some在否定句中应改为any

如：There are some students in the classroom.→ There are not any students in the classroom.

将下列各句改成否定句

1、Tom’s br other is walking in the park.

______________________________________________________

2、There are some books in the bookcase.

______________________________________________________3、The students of Class 5 are cleaning the classroom.

______________________________________________________ 4、I’m a student.5、Stop and wait at a red light.

____________________ _____________________________ 6、Your father can ride a bike.

______________________________________________________ 7、They can play football after school.

______________________________________________________ 8、We come from China.

______________________________________________________ 9、 Touch the door.

______________________________________________________

将下列否定句变肯定句

1、Don’t go at a red light.

2、Don’t run on the ferry.

______________________ _________________________ 3、I don’t go to school.4、The ferry doesn’t work.

______________________ _________________________ 5、Don’t turn left on the road.

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