动词第三人称单数形式讲解

1、什么是第三人称单数？

人称可分为三类：第一人称、第二人称和第三人称

第一人称：I  we

第二人称：you

第三人称：he、she、it、they和人名  称谓类（如：Peter、Jane、my father等）

结合以上知识，第三人称单数就是he、she、it、人名、称谓。

2、动词为什么要变成相应的三单形式？

在一般现在时中，跟在第三人称单数后面的动词也要变成相应的三单形式，例如：

I watch TV every day. 如果主语是三单，动词要变化：

-------He watches TV every day.

         She watches TV every day.

         Jane watches TV every day.

3、动词三单的变化规则

     1、一般情况下直接加s，如speak-speaks, like-likes, play-plays

    2、以s, x, sh, ch, o 结尾的加es，如 wash-washes, go-goes, do-does, watch-watches

    3、以辅音字母+y 结尾的，改y 为i 再加es，如 study-studies，try-tries

     4、特殊变化，如 have-has

4、does和doesn’t 在句子中的用法

否定句：主语+don’t/doesn’t+动词原形+（其他）。如：

            I don’t watch TV. 我不看电视。

当主语为第三人称单数时，要用doesn’t 构成否定句。如：

          He doesn’t watch TV. 他不看电视。

注意doesn’t后面用动词原形watch，而不是watches

一般疑问句：Do / Does+主语+动词原形+（其他）。如：

        Do you watch TV?    

 Yes, I do. / No, I don’t.

        Does he watch TV?    

Yes,he does./No,I doesn't.

练习题：

1. He often ________(have) dinner at home.

2. Daniel and Tommy _______(be) in Class One.

3. We _______(not watch) TV on Monday.

4. Nick _______(not go) to the zoo on Sunday.

5. ______ they ________(like) the World Cup?

6. What _______they often _______(do) on Saturdays?

7. _______ your parents _______(read) newspapers every day?

8. The girl _______(teach) us English on Sundays.

9. She and I ________(take) a walk together every evening.

10. There ________(be) some water in the bottle.

（参考答案1.has  2.are 3.don't 4.doesn't go 5.Do like  6.do,do 7.Do,read 8.teaches 9.take 10.is ）

11. Mike _______(like) cooking.

12. They _______(have) the same hobby.

13. My aunt _______(look) after her baby carefully.

14. You always _______(do) your homework well.

15. I _______(be) ill. I’m staying in bed.

16. She _______(go) to school from Monday to Friday.

17. Liu Tao _______(do) not like PE.

18. The child often _______(watch) TV in the evening.

19. Su Hai and Su Yang _______(have) eight lessons this term.

20. －What day _______(be) it today? － It’s Saturday.

(参考答案11.likes  12.have  13.looks 14.do 15.am 16.goes 17.doesn't 18.watches 19.have 20.is )

注意：在做题过程当中，先看主语，之后判断动词的变化哦！