8B chapter 1 语法.doc

中小学个性化教育专家精锐教育学科教师辅导讲义讲义编号_ 学员编号： 年 级： 初二 课时数：3学员姓名： 辅导科目： 英语 学科教师：万为火学科组长/带头人签名及日期课 题 由 if 和unless 引导的条件状语从句授课时间：备课时间：教学目标 由if 和 unless 引导的条件从句重点、难点 考点及考试要求 教学内容Step 1: Warming-upStep 2: RevisionStep 3: Key points & Analysis由 if 和unless 引导的条件状语从句 1. If we lose our short-term memory, we forget things happening recently. 译：_ 2. If the picture is silly, strange and colorful, you will remember it better.译：_ Conclusion: A: If sentences: actions with definite results. 有必然结果发生的行动 eg: If you go into a clothes shop you find clothes. If you go into a car showroom you see cars. Water turns into ice if you cool it. The wood floats if you put it into water.Conclusion: 1). 如果 if 条件句谈论的是重复发生和预示必定要发生的情景和事件，则主从句大多用一般现在时态。 eg: 如果你将鱼从水中取出来它会死。 2). 在if 条件句中，if 条件从句可以放在前面，也可以放在后面。当if 引导的条件从句放在前面时，后面常用逗号隔开。B: If sentences: actions with possible results. 有可能性结果发生的行动 eg: If you ask him，he will help you 如果你请他帮忙，他会帮你的。 If you fail in the exam，you will let him down 如果你考试不及格，你会让他失望的。 在 if 引导的条件状语从句中，如果从句谈论的是一个有可能发生的事实及其产生的相关的结果，主句用一般将来时态，从句用一般现在时态。 译：如果你早点睡觉，你早上就不会感到很累。 C: unless引导的条件状语从句：unless= if not. conj. 除非, 若不, 除非（否则） e.g.: Lets go out for a walk unless you are too tired. = If you are not too tied, lets go out for a walk. 我们出去散步吧，除非是你太累。Unless it rains, the game will be played. 除非下雨,比赛将照常进行。译：如果你不早点出发,你就不能及时赶到那儿。 我们可以把unless或ifnot 从句放在句子开头或末尾。You will be late for school unless you leave now. = Unless you leave now, you will be late for school. 除非你早点出发，（否则）你上学会迟到。You will be late for school if you dont leave now. =If you dont leave now, you will be late for school. 如果你不早点出发，你上学迟到。 译：除非你关上窗户，否则很多蚊子会进来。（至少两种译法） “if ” 引导的条件状语从句的用法,现在总结一下:1） 引导条件状语从句最常用的连词是if。 if 引导的条件句有真实条件句和非真实 条件句两种（非真实条件句会在以后的虚拟语气中阐述），其引导的真实条件状语从句表示在某种条件下某事很可能发生。2）if 条件句不一般,几个要点记心间; 条件句,放在前,逗号要放句中间。条件句表可能，主句多用将来时；条件句表事实，主句常用现在时。Exercise 一按照例句，完成下列句子。Eg: You will fail the exam if you dont work hard. = If you dont work hard, you will fail the exam. = You will fail the exam unless you work hard.= Unless you work hard, you will fail the exam 1）Unless you obey the rules, you will be punished. =_. =_. =_.2) A fish dies if you dont keep it in the water. =_=_=_.3) No body can learn English well, if he doesnt work hard on it. =_.=_.=_.4) Unless you start right now, you will be late for the meeting. =_.=_.=_.二用if 或unless 填空。1. you put wood into water, it floats.2. I sleep with the window open it is really cold.3. You will not improve your skill in a short time you practice playing the violinregularly.4. Ice melts you heat it.5. you boil water, it becomes steam （蒸汽）.6. you dont work hard, you will fail the exam.7. He cant be here on time he gets up early.8. you dont have enough sleep, you will feel tired.9. it is fine tomorrow, I will go fishing with my dad.10. you finish your homework, you will not go out to play.三单项选择。1. You will not remember the facts you understand them well. A. if B. unless C. if not D. because2. Shenzhen a dirty place if we the ground. A. is; litter B. will be; will litter C. is; are littering D. will be; litter3. If you harder, you will fail the exam. A. not work B. work C. dont work D. wont work4. you obey the rules, you will be punished. A. If B. Since C. Because D. Unless5. He cant see the words on the board unless he his glasses. A. wear B. wears C. doesnt wear D. to wear6. If you plant seeds in soil, . A. it grows B. they grow C. you grow D. it will grow7. If you check your timetable every night, it in your mind better. A. will stay B. stay C. stayed D. staying8. What happens If I play sports every day? . A. Your brain cannot think fast B. You remember things better C. You lose some of your brain cells D. You forget things easily9. Is it true that some parts of our brain can grow bigger we use a lot? A. if, it B. unless, it C. if, them D. unless, them10. If your friend tells you a phone number, you probably remember it for a short time. A. will B. will not C. could D. should11. I shall telephone the police and complain about it the noise . A. if, stops B. unless, stops C. if not, stops D. unless, stop12. I sleep with the window open its really cold. A. if B. if not C. unless D. until四根据句意和所给单词补全句子。 1. Water (turn) into ice if you cool it. 2. If you take some exercise every day, you (become) healthier. 3. If your picture (be) colorful, you will remember it well. 4. If you (not keep) the meat in the fridge, it will go bad. 5. If you dont improve your handwriting, you (lose) marks in the exam. 6. If you take a bath after work, you (feel) relaxed（放松的）. 7. If I (forget) to take the right books to school, my head teacher will get angry with me. 8. The fish will die unless you (put) it in the salt water. 9. You (feel) hot unless you turn on the air conditioner. 10. A lot of mosquitoes will get in unless you (close) the window.五按要求完成下列句子。A. 不改变句子意思，重新改写下列句子1. I will ring you up if I finish my work. I ring you up I finish my work.2. Youll be late for school unless you leave now. Youll be late for school you leave now.3. Well have a barbecue if it is fine tomorrow. We have a barbecue it is fine tomorrow.4. Ice cream melts unless you put it in a fridge.Ice cream melts if you put it in a fridge. 5. I will leave school if I pass the exam. I leave school I pass the exam. 6. We will go for a picnic unless it rains tomorrow. If it tomorrow, we will go for a picnic.B. 翻译下列句子。1. 如果你作业做完了就可以回家了。If you _ _ your homework, you can go home2.长大后我想成为一名教师。I will be a _when I _ _.3. 如果明天不下雨的话，我们将参观公园。We will visit the park _ it _ tomorrow.4. 如果他回来了，请告诉我一声。 Please _ me if he _ _. 5. 如果你累了，就好好休息一会儿吧。Have a good rest _you are _. Homework.一：用if 或unless填空。1. he wants to see me, you can tell him to wait.2. it snows tomorrow, well have a day or two off.3.We wont go to his party he invites us.4.She is sure to pass the exam she is ill.5. Im tired, Ill have a rest for tea.6.I wont buy that backpack it costs less than 100 yuan.7.I will lend you the money you pay back on time.8.You will fail the exam you study hard.9.I will buy a computer I am able to save enough money.10. you drop a glass , it breaks.二：单项选择( ) 1. Youll be late for school _you dont hurry. A. so B. if C. after D. although ( ) 2. If I _ free, Ill see you tomorrow. A. am B. will be C. was D. / ( ) 3. Do you know if he _ tomorrow? A. came B. comes C. will come D. /( ) 4. He works harder than _in his class. A. all the students B. all the boys C. any other student D. other students ( ) 5. Although Peter is clever, _work hard. A. he doesnt B. he isnt C. but he doesnt D. but he isnt( ) 6. Tom had a headache, _ he didnt go to the party. A. why B. so C. but D. or ( ) 7. _ he was doing his homework, the telephone rang.A. Because B. If C. While D. But( ) 8. You will stay healthy _ you do more exercise, such as running and walking. A. if B. how C. before D. where( ) 9. -Shall we go on working? -Yes, _I prefer to have a rest. A. when B. if C. because D. though( ) 10. None of us knew what had happened _they told us about it. A. when B. until C. after D. though( ) 11. I was late for class yesterday _ there was something wrong with my bike.A. when B. that C. until D. because( ) 12. Ill go swimming with you if I _free tomorrow.A. will be B. shall be C. am D. was( ) 13. You should finish your lessons _you go out to play.A. before B. after C. when D. while( ) 14. You will stay healthy _ you do more exercise, such as running and walking. A. if B. how C. before D. where( ) 15. None of us knew what had happened _they told us about it. A. when B. until C. after D. though( ) 16. I was late for class yesterday _ there was something wrong wi