一般现在时中，当主语是第三人称单数时，谓语动词要用第三人称单数形式，即常在动词原形后加-s或es
一、人称代词he, she, it是第三人称单数。如： 
He likes watching TV. 他喜欢看电视。 She has lunch at twelve. 她十二点吃午餐。 
二、单个人名、地名或称呼作主语；是第三人称单数。如： 
①Han Mei looks like her mother. 韩梅看起来像她母亲。②Beijing is in China. 北京在中国。 
三、单数可数名词或"this / that / the+单数可数名词"作主语时，是第三人称单数。如： 
①A horse is a useful animal. 马是有用的动物。 ②This book is yours. 这本书是你的。 
四、不定代词someone, somebody, nobody, everything, something等及指示代词this, that作主语时，是第三人称单数。如： ①Everyone is here. 大家到齐了。
五、不可数名词作主语时为第三人称单数。如： 
①The milk is in the glass. 牛奶在玻璃杯里。 ②The bread is very small. 那面包很小。
六、当数字或字母作主语时，看作第三人称单数。如： 
①"6" is a lucky number. "6"是个吉利数字。 ②"I" is a letter. "I"是个字母。 
I.写出下列动词的第三人称单数：

wash_________ listen _______ guess______ do_________    like ______  

drink ________   go _______   stay ________   make ________   look _________

have_______    pass_______   carry ____      come________    watch______

plant_______    fly ________   study_______   brush________    teach_______

II. 用所给动词的适当形式填空： 
1．I ________(write) to my sister every week. 

2. He ____________(not eat) any food this morning. 
3. He ______ not _______(see) me come in(进来).

4. ______ Jerry ___________(do) homework every day? 
5. Grandpa ________(like)__________(play) chess.

6. Tom’s family__________(watch) TV every night. 
7. Can you _______(help) me with __________ (swim).
8. What ______ your mother usually _______(do) in the evening? She usually _______ (wash) clothes.

9. Her sister ____________(have) Chinese every day.

10. Alicia and Jerry ________ (do) homework after school.

11. I _________ (know) the boy.

12. They __________(go) to work on Saturdays.

13. He usually _____________(come) to school early.

14. I often _____________(have) rice, meat and vegetables.

15. My grandfather _____________(play) sports in the park.

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

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

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

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

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

6._______ your parents __s English on Sundays.

8.She and I ________(take) a__(read) newspapers (报纸)every day?

7.The girl _______(teach) u walk together every evening.

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

10.Mike _______(like) reading.

11.They _______(have) the same hobby（爱好）.

12.My aunt _______(look) after her baby carefully（仔细地）.

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

14.I _______(be) ill.

15.My mom _____ eating brocolli.