（一）、动词的第三人称单数形式的构成（即三单式）：用于一般现在时中。
一、.第三人称单数：在一般现在时中，以下单词作主语时，谓语动词要用单数形式。
1. 第三人称单数代词有：he, she, it。
2. 指示代词this, that。
3. 不定代词 everyone, somebody, something, nobody, everything, everybody ,who等。
4. 单数可数名词。如：Lucy, a cat, my book, an orange, the bag等。
5. 不可数名词可被看作第三人称单数。
6. 当数字或字母作主语时，看作第三人称单数。
二、动词的第三人称单数形式的构成规则：
1)一般在动词词尾加 s; e.g. sing—sings dance--- dances like-- likes
2) 以s, x, o, sh, ch结尾加es; wash—washes watch—watches do-- does
3) 末尾是辅音字母＋y动词,改y为I,再加－es; carry—carries
4）have--- has am/ are---- is
三、一般现在时谓语动词的用法：
1)be动词:主语是第一人称用am,第三人称单数用is,其他用are;
2)一般动词: 主语是第三人称单数，动词词尾加s或es.主语是其他人称或复数时，动词要用原形。
动词第三人称单数专题练习
一、用括号内的词的正确形式填空。
1. He ________ (like) watching TV. 2. She ________( have) lunch at twelve.
3. It_________( look) like a cat. 4. Han Mei _______ (go) shopping with her mother.
5. Beijing _____ ( be) in China. 6. Uncle Wang often________(make) cakes.
7. A horse_______ (run) very fast. 8. Everyone __________( be) here.
9. This__________ (be) a pen. 10. Those _______(be) cucumbers.
11. There _________(be) some milk in the glass. 12. There __________(be) some apples on the tree.
13.My brother _____ ( fly) a kite. 14.You he and I ______( come) from China
15.Mr. White _________( teach) us math. 16. "6" _____(be) a lucky number.
17.I ________( sweep) the floor. 18. He can _________( ride) a horse.
19.The children ________(play) football on the playground.
20.Mr.Rice and Mrs. Rice _________(watch) TV at home.
21.The girl in red ____________(speak) English very well.
22. I’ll ________(do) my homework.
23. She’ll ________(go) to the zoo.
24.There ______ (be) a pen, a book and two rulers on the desk.
25. There _______(be) two ruler, a pen and a book on the desk.
26. Amy must __________(get) up now.
27.My Chinese teacher _________(give) me a hand.
28.They often __________(listen) to music.
（二）把句子改成一般疑问句的方法：
概念：一般疑问句：指能用yes 或no回答的句子。
变成一般疑问句的规则：
1、 当句子中有be(is, am, are, was, were), can, will, would, could, must, should 等词时，可将上述单词提到句首，第一人称变为第二人称，some要改为any。
1） ---She is a student. ---I s she a student?
2) ---He can swim. ---Can he swim?
2、.当句子的谓语是行为动词时，要借助动词Do/ Does/ Did放在句首，原来的动词（即三单式和过去式）要变回原形。Some要改为any。（注意：第三人称单数借Does, 一般过去时借Did, 动词原形的借Do），同时把第一人称改为第二人称，
1) He goes to school by bike . -----Does he go to school by bike?
2) She watched TV last night. -----Did she watch TV last night?
3) We play computer games. ----Do you play computer games?
3.当原句为祈使句时，常在句首加Will you….?构成一般疑问句
e.g.: Open the door. ----- Will you open the door?
[注意] 特殊情况：祈使句由Let’s引导，一般疑问句用Shall we……?构成
e.g.: Let’s go home.--- Shall we go home?
一般疑问句专题练习
将下列的句子改为一般疑问句。[请注意适用的规则]
1.I am very clever. 2. We are classmates.
_____________________________? __________________________?
3. She is watering the flowers. 4.I was a football player.
______________________________ ? ____________________________?
5.There are some students here. 6. This is a desk.
______________________________? ____________________________?
7.These are goats. 8.I can milk a cow.
_______________________________? ___________________________?
9.She can shear a sheep. 10. It’ll be rainy tomorrow.
______________________________? _____________________________?
11. I’ll come here early. 12.You must hand in your homework.
____________________________ ? _____________________________?
13.I’d like some beef. 14. She’d like a hamburger.
_________________________? ____________________________?
15.I could have some noodles. 16. I like painting.
____________________________? ____________________________?
17.She watches TV every day. 18.Mike has math on Monday.
_____________________________? ______________________________?
19.They eat some peaches. 20.Tom missed the bus this morning.
_____________________________ ? _______________________________?
21.Miss White had a cold yesterday. 22.My science teacher often play with us.
______________________________? ________________________________?
23.Let’s go shopping. 24.Close the window.
_____________________________? ______________________________?
25.He can’t wash the plates. 26. I know she is Amy.
____________________________? ______________________________?
英语语法专题2
（三）把句子改成否定句的方法：
1. 当句子中有be(is, am, are, was, were), can, will, would, could, must, should 等词时，变否定句在上述单词后面加not, some 要改为any, and 要改为or, too 要改为either。
2. 如果句子的谓语是行为动词，变否定句时可以在行为动词的前面加don’t/ doesn’t/ didn’t. 原来的动词（即三单式和过去式）要变回原形。Some要改为any，and 要改为or, too要改为either.
(即第三人称单数借助动词doesn’t, 一般过去式借助动词didn’t, 动词原形的借助动词don’t)
3.祈使句的否定在句首加Don’t .
e.g.: Open the door.--- Don’t open the door. Be quiet!------- Don’t be quiet!
但let引导的祈使句在let sb 后面加not . (即let sb not do sth)
e.g.: Let’s go home.-- Let’s not go home. Let me see. --- Let me not see.
否定句专题练习
将下列的句子改为否定句。
1.This is an egg. 2. These are onions.
______________________ ___________________________
3.Miss Zhang and Miss Chen are our teachers. 4.He was at home yesterday.
________________________________________ _____________________
5.There is some milk in the cup. 6.I can sweep the floor and make the bed.
___________________________ _______________________________
7.She can use the chopsticks, too. 8.I’ll go to Beijing.
__________________________ _____________________________
9.It’ll be snowy tomorrow. 10. I could have some vegetables.
___________________________ ______________________________
11.I’d like some noodles for lunch. 12. She’d like to eat a hot dog.
_____________________________ _____________________________
13.He must clean the classroom. 14. I run very fast.
____________________________ ______________________________
15.She studies English very well. 16.Amy watches TV at home.
____________________________ _______________________________
17.My friends often play computer games. 18.They go to school at 7:00.
__________________________________ ______________________
19.The dog eats bone and rice. 20.I got a book from Amy.
____________________________ __________________________
21.He made a kite. 22. Mike won the ping-pong game.
___________________________ ___________________________
23.Please answer the phone . 24. Be late for school.
_____________________________ _____________________________
25.Let’s clean the board. 26. Let him play in the street.(街道)
__________________________ _______________________________
27.I know he is from Canada. 28.I think it’s going to rain.
_____________________________ _____________________________
（四）把句子改成特殊疑问句的方法（即对句子中划线部分提问）
1.句型结构： 特殊疑问词 + 一般疑问句
2.常用的疑问词：不同的情形使用不同的疑问词。
① What 什么 （问东西、事情、干什么） ② What colour (问颜色) ③ What day (问星期)
④What time (问时间、几点钟) ⑤What’s the date?(问日期) ⑥What…like(问样子)
⑦How(问怎样、方式) ⑧How old (问年龄)
⑨How many+名词复数（问数量） ⑩How much +不可数名词（问数量）
11.How much (问价格) 12.How often (问次数、频率)
13.How long (问长度、时间长短) 14.Where (问地点、方位)
15.When(问时间) 16.Who(问谁（主格），提问主语时谓语动词要用三单式) 17.Whom(问谁（宾格）) 18. Whose (问谁的（所有格)）
19.Which (问哪一个/一件/一只) 20.Why(问原因（即为什么）回答用because….)
特殊疑问句专题练习
对句子中划线提问。
1.This is a pen. 2. He’s Mr. Heart. 3. His name is Gao Wei.
_________________ ________________ __________________
4.The notebooks are on the desk. 5. I’m fine. 6. I’m five.
___________________________ ______________ ________________
7.We are from China. 8. She comes from England.
_______________________ _____________________________
9.It’s cloudy in Hong Kong. 10.My mom is well. 11.My grandpa is ill.
______________________ _________________ ________________
12.This is my book. 13. These socks are my brother’s
_________________________ ______________________________
14.The bikes are ours. 15. My dress is pink and white.
_________________________ ______________________________
16.It’s Sunday today. 17. It’s 7:15 now. 18.It’s May 20th today.
_____________________ ________________ __________________
19.My birthday is in June. 20. We have English on Mondays.
_______________________ __________________________
21.We have math and music on Fridays. 22.She is active and funny.
________________________________ ___________________________
23.My sweater is 90yuan . 24. I can see two birds in the tree.
_______________________________ ____________________________
25. I have two pens. 26. There are some sheep at the farm.
_____________________________ ____________________________
27.I have a pair of sneakers. 28.There is some bread on the plate.
____________________________ _________________________
29.She often reads books on Sunday. 30.She can clean the window.
______________________________ _____________________________
31.Mr.Liu teaches us math. 32. I play football with Tom.
_____________________________ __________________________
33.The girl in yellow in my classmate. 34. I’d like some soup.下载本文
