if引导条件状语从句讲解与练习.doc

在 if 引导的条件状语从句中，if 和条件句位置灵活，可直接放在主句后面，若 if 条件句放句首， 从句后面要加逗号，和主句隔开。还要注意前后时态一致原则一、用所给词的适当形式填空1.If you _(feel) tired, you _ (have) to have a rest.3. If there _(be) fewer trees, there _( be) more pollution.5. If Marcia _(live) alone, she _( keep) a pet parrot.6. Lana _( buy) a new dress if the old one _(be) out of style.9. Peter _( send) me a beautiful souvenir if he _(tour) Spain.10. If Mr Green _(say) I am hard- working, my parents _( feel) glad.11.I _(go) to the beach if it_ ( not rain) this week.13.He _(write) a letter to his grandparents if he _(get) his report card this week.14. If she _(get) up late, she _ ( not catch) the early bus.15. Peter _(major) in English if he _(pass) the exams in Peking University.16. 如果努力学习，你就会取得好成绩。If you_ _, you _ good _.17. 他如果看电视太久了，他的父母会不高兴。If he _ TV too much, his parents _ _ unhappy.18. 如果我们为他组织生日聚会，大家都会来的。Everyone _ if we _ a birthday party _ him.19. 如果明天不下雨，我会和你一起去公园的。 If it _ _ tomorrow, I _ go to the park _ you.21. 如果他有空，他会帮助你的。If he _, he _ you.23. 你如果抄同学的作业就不能学好各门功课。You _ _ good at all the subjects if you _ the other students homework. .单项选择（15分）1.If you _ to the party, youll have a great time. A. will go B. went C. go D. going2. It will be a long time _ Peter _ his work. A. since, has finished B. after, finishes C. when, will finish D. before, finishes.3. What will father _ us from Japan? A. take B. bring C. carry D. make 4. Weifang is famous _ kites. A. for B. to C. on D. with5 I _ her the answer if she _me. A. can tell, will ask B. will tell, will ask C. would tell, ask D. will tell, asks6. What are you going to do tomorrow?-Well go to the library tomorrow if it _. A. isnt rain B. rain C. wont rain D. doesnt rain7.Do you know when he will come back tomorrow?-Sorry, I dont know. When he _ back, Ill tell you. A. comes B. will come C. come D. may come 8. What will you do if you _ to the old folks home visit?A. go B. went C.going D. will go9. If I eat _ food, Ill be very fat.A. too many B. many too C. too much D. much too10. Ill give the book to him if he _ here next Sunday.A. will come B. comes C. is coming D. came11. There _an English film in our school tomorrow.A. is going to have B. will have C. is going to be D. has12. Could you tell us where _？A. will the next Olympic Games held B. the next Olympic Games will be heldC. would the next Olympic Games be held D. the next Olympic Games would be held13. When my mother returned last night, I _ a book. A. read B. am reading C. was reading D. am going to read14.What _ you _ when it began to rain?A. do, do B. were, doing C. are, doing D. did, do15. Ill wake you up when he _back.A. will B. is going to come C. comes D. come中考考点情态动词练习1. -Mum， may I watch TV now？-Sure， but you _ help me with my English. A. can B. may C. must D. could2. -_ I download the article again？-No，you neednt.A. Shall B. Will C. Must D. Can3. -Can you go skating with us this afternoon？-Sorry， I cant. I _ take care of my little sister at home.A. can B. may C. would D. have to4. -Must I hand in my exercise book today？-No， you _.A. cant B. neednt C. mustnt D. wont5. -May I have a word with you？-No， you _. Im busy today.A. neednt B. wouldnt C. dont have to D. cant6. -_I have your English name， please？-Yes， Helen. H-E-L-E-N.A. Must B. May C. Will D. Need7. -Who is the boy over there？ Is it John？-No， it _ be him. John is much taller.A. mustnt B. may not C. cant D. neednt8. -Can you play Frisbee， Jay？-Yes， I _. Its easy.A. must B. can C. need D. may9.-You must come back every month. -Yes， I _.A. will B. must C. should D. can10. She _ know the answer， but Im not sure.A. maybe B. may be C. may D. must11. - Must we clean the room right now？- No， you. You clean it after lunch.A. neednt；may B. neednt;mustC. Mustnt； can D. mustnt；may12. John_ come to see us tonight， but he isnt very sure yet.A. may B. can C. has to D. must13. Children _ play with fire.A. mustnt B. cant C. shouldnt D. neednt14. -_ I come in， Mr Green？-Yes,come in， please.A. Must B. Need C. Will D. May15. -Must I finish the work today？-No， you _. You _ finish it tomorrow.A. mustnt； may B. cant； canC. neednt； may D. neednt； must一、用can, may, must, need, have to, had better的适当形式填空：1. You _ return the library book on time.2. I _ (not) find the way to the hospital. _ you show me the way?3. _ I finish the work right now? No, you _ (not). You _ do it later.4. He said he _ (not) come tonight.5. Her mother was ill. She _ stay at home and look after her.6. Its time for class. You _ stop playing football or you _ be late for class.7. We _ start right now, or they would get there first.8. The cloud is lifting, so it _ (not) be a rainy day tomorrow.二、选择填空：1.Excuse me. Will you please tell me the way to the railway station? Oh, sorry, but I dont know. You _ go and ask that policeman. A. mayB. must C. would D. should2.This book _ Lucys. Look! Her name is on the books cover.A. cant beB. may be C. mustnt be D. must be4. _ I finish the work today? No, you _.A. Must, cantB. Must, neednt C. May, needntD. Can, mustnt5. _ we ask you some questions? Sure, go ahead! A. Will B. Shall C. Must D. Need6.You must come back every month. Ye