英语肯定句变否定句练习.doc

专题: 把肯定句改成否定句
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. àI don’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.à He doesn’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.à There are not any students in the classroom.
将下列各句改成否定句
1、Tom’s brother is walking in the park.
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2、There are some books in the bookcase.
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3、The students of Class 5 are cleaning the classroom.
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4、 I’m a student. 5、Stop and wait at a red light.
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6、Your father can ride a bike.
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7、They can play football after school.
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8、We come from China.
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9、 Touch the door.
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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.
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3、I don’t go to school. 4、The ferry doesn’t work.
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5、Don’t turn left on the road.
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