小学英语肯定句变否定句方法及练习.doc

句型转换的方法（一）

一、肯定句改否定句的方法——一步法

1、在be动词后加not。如：is not ，are not ，am not，was not，were not；例如：He is in the classroom. (改为否定句）

He is not ( isn’t ) in the classroom.

2、在can，should，will等后加not。如：can not，should not，will not；

例如：Mike can sing English songs. ( 改为否定句）

Mike can not ( can’t ) sing English songs.

3、上述都没有的，在动词前加助动词否定形式don’t/doesn’t/didn’t。

例如：I like pizza. ( 改为否定句）

I don’t like pizza.

4、句中有some 的要改成any。

例如：There are some books on the desk. ( 改为否定句）

There are not ( aren’t ) any books on the desk.

二．实战演习: 把下列各句改为否定句

1.John is walking in the park.

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2.Tom and Marry are friends.

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3.I’m a student.

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4.She will go to Beijing tomorrow,

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5.We get there by bike.

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6.He likes apples.

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7.There are some flowers in the picture.

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8.I often play football with my friend.

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9.We are from China.

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10.They can go to school by ferry.

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