小学四年级现在进行时.doc

现在进行时预习资料
一、现在进行时的定义，构成，标志性词语
定义：表示现在或现阶段正在进行或发生的动作或存在的状态。
中文翻译：正在（做什么）
构成：由be(am/is/are)+动词-ing形式构成
  标志性词语：
1.现在进行时.通常用“now”。 2.现在进行时.通常用“look”。
3.现在进行时.通常用“listen”。
二、动词现在分词的构成规则
1  一般情况下直接加ing
think---thinking   sleep---sleeping   study---studying   look---looking tell ---telling
sing---singing     play---playing email---mailing go---going teach---teaching
2  以不发音的字母e结尾的单词,去掉字母e，再加ing
e---ing  make---making    have---having    take---taking wake---waking
3  以重读闭音节结尾，通常呈现 “辅+元+辅”结构的动词，双写末尾的辅音字母，再加ing
stop---stopping get ---getting sit ---sitting put---putting
run---running  shop----shopping   swim------swimming
三、 现在进行时的句型变化
1、 肯定式结构：主语+be+动词-ing形式+其他.
例如：We are running now. （我们正在跑步.）
2、否定式结构：主语+be+not+动词-ing形式+其他.
例如：We aren’t running now.（我们不在跑步.）
3、一般疑问句式结构：Be+主语+动词-ing形式+其他？
例如：Are they running now？（他们正在跑步吗？）
回答：肯定Yes, they are. 否定:No, they aren’t
4.特殊疑问句式结构：疑问词+be+主语+其他？
例如:What are they doing now?（他们正在做什么？）
回答：They are running.（他们正在跑步）
四、 Be动词的人称对应
第一人称单数：I am doing
第二人称单数：You are doing
第三人称单数：He is doing、Lily is doing、My mum is doing...
所有的复数人称：We are doing、They are doing、The policeman are doing

五、 朗读例句
1. I am doing my homework now.
2. I am emailing my friends.
3. I am running in the park.
4. I am singing in the music room.
5. You are doing housework.
6. You are watching TV.
7. You are having an English lesson.
8. You are having a picnic.
9. Look! My mother is running.
10. He is sleeping.
11. Listen! The girl is singing with the bird.
12. Now Jiamin is reading an interesting book.
13. Listen! They are reading.
14. Look! The children are painting.
15. They are cooking meals.
16. The teachers are having lunch.
17. Are you doing housework?
18. Are you watching TV?
19. Is your mum running?
20. Is he sleeping?
21. Are they cooking?
22. Are the teachers having dinner?
23. What are they doing?
24. What is he doing?
六、 试一试
1. Look!Mary_____________singing there.
2. I _____________ taking photos in the garden.
3. _____________you reading a book?
4. The boy _____________ playing football with his friends.
5. My sister _____________ playing puter games.
6. The children _____________ having an art lesson.
7. The girl _____________ swimming.
8. I _____________ washing hands
9. What _____________ you doing？
10. The policewoman_____________ wearing uniforms.

（现在进行时）巩固练习
一. 写出下列动词的现在分词形式
　　 work_______      sing_______     play_____     
study_______ have _______    dance ________  
write_____     take________run_________   
 sit_________     shop________     swim__________
　　 二.按要求改写句子
  1. The boy is playing basketball.
  否定句：____________________________
一般疑问句：_________________________
肯定回答：______________________否定回答：______________________
 对“is playing basketball”提问：__________________________
对“The boy”提问：__________________________
2. They are singing in the classroom.
否定句：____________________________
一般疑问句：_________________________
肯定回答：____________________否定回答：______________________
对“are singing”提问：__________________________
对“in the classroom”提问：__________________________
三. 用现在进行时完成下列句子
1. What _________ you __________ (do)?
2. I _____________ (sing) an English song.
3. What ________ he ____________ (mend)?
4. He ______________ (mend) a car.
5. ______ you __________ (fly) a kite? Yes, _____________.
6. ______ she ___________ (sit) in the boat?
7. ______ you _____________ (ask) questions?
8. We _______________ (play) games now.
9. What are you _________(do) now? I ___________(eat) bread.
10. It’s nine o’clock. My father_______________(work) in the office.
11.   Look, the boy____________(put) the rubbish into the bin.
12.   __________he__________(clean) the classroom?
No, he isn’t. He____________(play).
13. Where is Max? He___________(run) on the grass.
14.   Listen, who____________(sing) in the music room?
Oh, Mary_____________(sing) there.
四。选择题
　　1. Who _____ over there now?  
A. singing   B. are sing   C. is singing   D. sing
　　2. It’s eight o’clock. The students _____ an English class.  
 A. have   B. having   C. is having D. are having
　　3. Listen! The baby _____ in the next room.  
 A. crying   B. cried   C. is crying    D. cries
　　4. Look! The twins _____ new sweaters.  
A. are wearing   B. wearing   C. are wear D. is wearing
　　5. Don’t talk here. Grandparents _____.
A. is sleeping   B. are sleeping   C. sleeping   D. sleep
　　6. Tom is a worker. He ____ in a factory. His sisters _____ in a hospital.
A. work/ work   B. works/ work   C. work/ works
　　7. Who _____ English best in your class?  
A. speak   B. speaks   C. speaking
　　8. Mrs. Read _____ the windows every day.  
A. is cleaning   B. clean   C. cleans
　　9. We _____ music and  often _____ to music.  
 A. like/ listen   B. likes/ listens   C. like/ are listening
　　10. She _____ up  at six in the morning.  
A. get   B. gets   C. getting
　　11. On Sundays he sometimes _____ his clothes
and sometimes _____ some shopping.
A. wash/ do   B. is washing/ is doing   C. washes/ does
　　12. The twins usually _____ milk and bread for breakfast, but Jim _____
some coffee for it.  
 A. have/ have   B. have/ has   C. has/ have