英语肯定句变否定句练习

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d on’t或doesn’t ；

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

②句中动词为三单式的，加does n’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 yeaterday .

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 brother is walking in the park.

______________________________________________________

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

______________________________________________________

5、Tom and Mary are friends.

______________________________________________________

7、There are some books in the bookcase.

______________________________________________________

9、I’m a student.

______________________________________________________

11、Your father can ride a bike.

______________________________________________________

13、They can play football after school.

______________________________________________________

16、We come from China.

______________________________________________________

19、He likes the violin.

______________________________________________________

20、Have some bread, Tom.

______________________________________________________

一般疑问句

一般疑问句

在英语的学习中，一般疑问句的转换及回答是经常碰到的问题，现在我们就来探讨一下有关一般疑问句的问题。

一、什么是一般疑问句

用Yes或No作答的疑问句叫一般疑问句。一般疑问句还有下列特点：1、以be动词、助动词或情态动词开头；例：Is your father a teacher? Does she like animals? Can Jenny speak Chinese?2、往往读升调；3、译成汉语，都可以带上“吗”，例如上面三句可分别译为：你父亲是老师吗？她喜欢动物吗？Jenny会说英语吗？

二、例何将陈述句变成一般疑问句？

要将陈述句变成一般疑问句，可以遵循下列步骤：

1.看句中有没有be动词（am、is、are、was、were）、和情态动词（can、must、will、may等），如果有，将其提到句首，句末打上问号即可。

例：She is a girl.

→Is she a girl?

Tom's father can play the piano.

→Can Tom's father play the piano?

练习：

is a boy

is a cat .

is your sister.

are my books.

are apples.

2.如果句中没有be动词、助动词或情态动词，则根据谓语动词的形式借助do 的相应形式放在句首。具体方法是：如果谓语动词是原形或者主语是第一人称、第二人称、第三人称复数则借do；如果谓语动词是一般现在时第三人称单数形式，则借does；需要注意的是，借does后，原句的谓语动词要变回原形。

例：They go to school by bike.

→Do they go to school by bike?

Bill gets up at 6:30 every day.

→Does bill get up at 6:30 every day?

练习：

love my parents.

play computer games every night.

have a TV.

三.陈述句变一般疑问句应注意的事项

陈述句变成一般疑问句除了遵循上述规则以外，还应注意下列几点：

1.如果陈述句中有第一人称，则变问句时最好要变为第二人称。

例：I usually have lunch at school.

→Do you usually have lunch at school?

My father is playing soccer.

→Is your father playing soccer?

2.如果陈述句中有some, 则变问句时往往要变成any 。

例：There is some water on the playground.

→Is there any water on the playground.

3．如果句中含有实义动词have且表示“有”时,除借do外，也可将其直接提到句首。

例：I have some friends in America.

→Have you any friends in America?/Do you have any friends in America?综合练习：

1. His father is an English teacher.

2. These cats are crying.

3. They can swim.

4. I like to read English.