在一般现在时中，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。但有些同学们对于哪些主语是第三人称单数还不十分清楚，现归纳总结如下：

  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。

  It looks like a cat. 它看起来像只猫。

  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. 韩梅看起来像她的母亲。

  ②Beijing is in China. 北京在中国。

  ③Uncle Wang often makes cakes. 王叔叔经常做蛋糕。

  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。

  ③That car is red. 那辆小汽车是红色的。

  ④The cat is Lucy's. 这只猫是露茜的。

  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。

  ②There is something wrong with the watch. 这块手表有毛病。

  ③This is a pen. 这是一支钢笔。

  ④That is an eraser. 那是一块橡皮擦。

  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。

巩固练习题：
I.写出下列动词的相应形式：
1. 第三人称单数： wash_________ match _______guess______     study______     finish_________  go________      snow______     carry_________
2.写出下列动词的过去式：stop______  see________ drive ________let_______ carry______ keep_____ join______ find_______ think________ teach______ catch______
3. 写出下列动词的现在分词形式：
stay_______  begin______ forget_______
forget______  lie________  die _______ run_______  prefer______  give________
ring_______        dance______      hope_______
II. 用所给动词的适当形式填空：
  1．I ________(write) to you as soon as I _______(get) to London.
  2. He doesn’t feel well and ____________(not eat) any food this morning.
  3. He ______ not _______(see) me come in, for he ___________(read) something with great interest.
  4. I _________(let) you have the book as soon as I _________(finish) it.
  5. While we ________(wait) for our teacher, a little boy ________(run) up to us.
  6. Don’t make a noise. Grandpa __________(sleep).
  7.It’s seven now, Tom’s family__________(watch) TV.
  8. It ________(take) me two hours to finish my homework last night.
  9. What ______ your mother _______(do) at eight yesterday evening? She _______(wash) clothes.
10. _______ it ______ (rain) when school was over yesterday?
11. What _______(do) _______ tomorrow? We ________ (play) football.
12. There ________ (be) a football match on TV this evening.
13. They said they ________ (visit) the Great Wall the next summer holiday.
14. Who _______ (dance) the best in your class?
15. Will you come if he _____________ (not come)?
16. The teacher told us the earth __________ (move) round the sun.
17. They _______ (have) a party in the garden if it ________ (not rain) tomorrow.
18. She ________ (buy) a sweater yesterday.
19. I don’t know if Mr. Wang ______ (go) to Shanghai tomorrow. If he _____ (go), I ______ (ask) him _______ (take) some books to my daughter, because she _______ (study) there.
单项选择：
1. The students will go to the Summer Palace if it _____ tomorrow.
A. Don’t rain.  B. doesn’t rain  C. won’t rain
  2. There _____ an English film next week.
A. will have  B. is going to have  C. is going to be D. was going to be
  3. The picture _______ nice.
A. looks  B. is looked  C. look  D. is looking
  4. She ______ down and soon fell asleep.
A. live  B. lain  C. laid  D. lay
  5. They _____ the office at nine yesterday morning.
A. reached to  B. arrived  C. went  D. get to
  6. We shall go to Shanghai on business before you _____ back next week.
A. wil come  B. came  C. would come  D. come
  7. Don’t smoke until the plane ______ off.
A. takes  B. took  C. was taken   D. is take
  8. I saw her ____ the room this morning.
A. to enter   B. entered  C. enter  D. enters
  9.the teacher asked us ______ to school on time.
A. to come  B. coming  C. come  D. comes
10. John is always ______ others.
A. help  B. helping  C. helps  D. to help
11. He told us ______ at eight.
A. working  B. to work  C. work  D. worked
12. You’d better ______ at home and ______ your homework.
A. to stay, do  B. stay, do C. to stay, to do  D. stay, to do
13. He sat down ______ a rest.
A. having  B. have  C. to have  D. had
14. Uncle Wang knows _______ a washing machine.
A. how to make  B. to make  C. how making  D. what to make

谢谢楼主分享,大公无私