if条件句讲解及练习0
if条件句讲解及练习
含if的真实条件句和虚拟条件句
（1）在英语中，语气是动词的一种形式，用来表示说话人的意图或态度。
英语的语气有三种：陈述语气（表示所说的话是事实），祈使语气（表示所说的话是请求或命令）和虚拟语气（表示所说的话只是一种主观的愿望或假设或建议等）。
如果所表示的条件是真实的，或者完全有可能实现的，叫真实条件句，主句和从句的谓
语都用陈述语气。如：
If she doesn’t hurry up, she will miss the first bus.
如果所表示的条件不可能实现或者实现的可能性很小时，叫非真实条件句，主句和从句
If I were you, I would not let out the secret.
如果我是你的话，我不会泄露这个秘密的。
If I knew his new address, I would tell you.
如果我知道他的新地址，我会告诉你的。
If he studied harder, he would pass the exam.
如果他学习再努力点的话，他会通过考试的。
If we had made fuller preparation, we should have won the game.
如果我们做了更充分的准备的话，我们肯定就赢了这场比赛。
If you had taken my advice, you wouldn’t have been late for the meeting.
如果你听了我的建议，你开会就不会迟到了。
If she were to/should come, I would tell her the secret.
万一她来的话，我会告诉她这个秘密。
（2）省略if的虚拟条件句
在含有were, had, 或者should 等词的虚拟条件句中，可以省略if, 将were, had或者should这些助动词放在句首。如：
Were I you, I would not let out the secret.
Had we made fuller preparation, we should have won the game.
Had you taken my advice, you wouldn’t have been late for the meeting.
Should she come, I would tell her the secret.
高一语法练习if条件句及虚拟语气
一、单项选择
1. If I _____ where he lived, I _____ a note to him.
A. know, would have sent
B. had known, would have sent
C. know, would send
D. knew, would have sent
2. Mary is ill today. If she _____, she _____ absent from school.
A. were not ill; wouldn’t be
B. had been ill; wouldn’t have been
C. had been ill; should have been
D. hadn’t been ill; could be
3. He acted as if he _____ everything in the world.
A. knew
B. knows
C. has known
D. won't know
4. If you had enough money, what _____?
A. will you buy
B. would you buy
C. would you have bought
D. will you have bought
5. If Mr. Young _____ with justice, he _____ such a wrong thing.
A. were treated; wouldn’t do
B. had been treated; wouldn’t have done
C. were treated; wouldn’t have done
D. had been treated; wouldn’t do
6. What _____ if there _____ no light during the day?
A. will happen; was
B. would happen; is
C. happens; were
D. would happen; were
7. The spokesman acted that way as if he _____ anything about the accident but actually
he did.
A. doesn’t hear
B. didn’t hear
C. haven’t heard
D. hadn’t heard
8. If it _____ not for the fact that you _____ ill now, I would surely punish you.
A. is; are
B. were; were
C. were; are
D. was; were
9. Many Chinese movie stars now have given up their Chinese nationality. If I were them,
I _____ that.
A. shouldn’t do
B. didn’t do
C. hadn’t done
D. won’t do
10. I want to get back by 5 o’clock if _____.
A. likely
B. can
C. possible
D. probable
11. It seems as if it _____ already summer now but it is only February.
A. is
B. was
C. were
D. had been
12. If Henry had not pulled his cap low over his brow, he _____ by the police.
A. might be recognized
B. might have been recognized
C. would have recognized
D. was to have been recognized
Keys:
1—5 BAABB 6—10 DDCAC 11—12 CB
if引导的条件状语从句讲解和练习(答案)
t 条件状语从句 一、 条件状语从句通常由 if （如果）, unless （除非），as long as （只要）引导。 例如：If it rains tomorrow, we won ’go to the park. 如果明天下雨，我们就不去公园了。 Unless weather stops me, I go for a walk every. 我每天都会去散步，除非遇上坏天气。 Our parents will be pleased with our performance as long as we try our best. 小试牛刀：1、只要我们竭尽全力，父母就会满意我们的表现。 Our parents will be pleased with our performance _____ _____ ______ we try our best. 2、如果人人为保护环境做出贡献，世界将会变得更美好。______ ______ ______ _____ _______ to protecting the environment, the world will become much more beautiful. 二、if 引导的条件状语从句 （1）“if 从句+祈使句”的句子。其实，if 作为一个连词，主句也可以是其他形式的句子。 例如：If you want to go, please let me know. If the green light isn ’t on, wait for a minute. (2)“祈使句 + and (or)+ 陈述句” 在意思上相当于一个带有条件状语从句的复合句。 注意：A. “祈使句 + and + 陈述句”可以转化为 if 引导的肯定条件状语从句，而且主语是第二人称。 B. “祈使句 + or + 陈述句”可以转化为 if 引导的否定条件状语从句，而且主语是第二人称。 例如：Study hard and you will pass the exam. =If you study hard, you will pass the exam. Hurry up, or you ’ll be late. =If you don ’t hurry up, you ’ll be late. 考题 (2010 重庆中考)Work hard ，________ you may catch up with your classmates soon. A.or B.but C.and D.yet 思路解析：本句是“祈使句＋and”的句型，句意为“努力学习，你会很快赶上其他同学的”，and 在句中表示承接 关系，所以选 C 项。答案：C 黑色陷阱：本题的陷阱是句型，本句型区别于“祈使句＋or”，这个句型的含义是“……，不然的话/否则……”。 绿色通道：祈使句后面既可以加 and ，也可以加 or ，所以要全面分析句意，再作决定。 小试牛刀：用 if 连接下列句子 1、Go to bed early and you will have a good rest. 2、Hurry up, or you ’ll miss the bus. 三、if 从句与主句具有以下特点： 1．If 从句中用一般现在时，表示未来的一种条件，从句中可以加时间状语。 e.g.If yo u can’t come tomorrow, we can hold the party a little later.明天你如果不能来，我们可迟一点举行宴会。
初中英语语法——If引导的条件状语从句(讲解及练习)
条件句从句主句 真实一般现在时一般将来时 情态动词+动原祈使句 非真实 一般过去时 be动词用（were） would/could+动原初中英语――条件状语从句（讲解&练习） Ⅰ条件状语从句的定义 Ⅱ条件状语从句的引导词 1.if引导的条件状语从句：表示在某种条件下某事很可能发生。 If we pay much attention to the earth, we'll have a better world. 如果我们多关爱地球，就会拥有一个更美好的世界 If it rains tomorrow, what shall we do? 如果明天下雨，我们怎么办？ 注意：if还可以引导虚拟条件句，表示不可实现的条件，从句中多用一般过去时或过去完成时。 What would happen if there were no water ? 如果没有水会怎样？ 2.unless引导的条件状语从句，unless的意思是如果不，除非。可与if...not互换。 You will fail in English unless you work hard. 你英语考试会不及格的，除非你更加努力。 3.as /so long as引导的条件状语从句：as /so long as意思是“只要” So long as you're happy,i will be happy. 只要你高兴，我就高兴。 Ⅲ条件状语从句的种类 Ⅳ条件状语从句的时态原则 用法例句 ①主句为一般将来时态，if从句用一般 现在时态（即主将从现）。We will stay at home if it rains tomorrow. 如果明天下雨，我将要呆在家。 ②主句中含有情态动词，if从句用一 般现在时态。If you finish your homework, you can go home now.如果你做完了作业，你现在可以回家了。 ③主句为祈使句，if从句用一般现在 时态。Don’t jump into the river if you feel very hot. 如果你感到很热，不要跳入河里。 ④主句为过去将来时，if从句用一般 过去时态（如果涉及到be动词， 一律都用were）。此时，表达的是和现实相反的推测，用虚拟语 气。If I were you, I wouldn’t do it like that.如果我是你，我就不会那么做的。 If you gave me some money, I would be very happy. 如果你给我一些钱，我就会很高兴的。 二、if 引导的条件状语从句 （1）“if 从句+祈使句”的句子。其实，if 作为一个连词，主句也可以是其他形式的句子。 例如：If you want to go, please let me know. (2)“祈使句 + and (or)+ 陈述句”
if引导的条件状语从句讲解和练习(答案)
条件状语从句 一、条件状语从句通常由if（如果）, unless（除非），as long as（只要）引导。 例如：If it rains tomorrow, we won’t go to the park. 如果明天下雨，我们就不去公园了。 Unless weather stops me, I go for a walk every. 我每天都会去散步，除非遇上坏天气。 Our parents will be pleased with our performance as long as we try our best. 小试牛刀：1、只要我们竭尽全力，父母就会满意我们的表现。 Our parents will be pleased with our performance _____ _____ ______ we try our best. 2、如果人人为保护环境做出贡献，世界将会变得更美好。______ ______ ______ _____ _______ to protecting the environment, the world will become much more beautiful. 二、if引导的条件状语从句 （1）“if从句+祈使句”的句子。其实，if作为一个连词，主句也可以是其他形式的句子。 例如：If you want to go, please let me know. If the green light isn’t on, wait for a minute. (2)“祈使句+ and (or)+ 陈述句” 在意思上相当于一个带有条件状语从句的复合句。 注意：A. “祈使句+ and + 陈述句”可以转化为if引导的肯定条件状语从句，而且主语是第二人称。 B. “祈使句+ or + 陈述句”可以转化为if引导的否定条件状语从句，而且主语是第二人称。 例如：Study hard and you will pass the exam. =If you study hard, you will pass the exam. Hurry up, or you’ll be late. =If you don’t hurry up, you’ll be late. 考题(2010重庆中考)Work hard，________ you may catch up with your classmates soon. A.or B.but C.and D.yet 思路解析：本句是“祈使句＋and”的句型，句意为“努力学习，你会很快赶上其他同学的”，and在句中表示承接关系，所以选C项。答案：C 黑色陷阱：本题的陷阱是句型，本句型区别于“祈使句＋or”，这个句型的含义是“……，不然的话/否则……”。 绿色通道：祈使句后面既可以加and，也可以加or，所以要全面分析句意，再作决定。 小试牛刀：用if连接下列句子 1、Go to bed early and you will have a good rest. 2、Hurry up, or you’ll miss the bus. 三、if从句与主句具有以下特点： 1．If从句中用一般现在时，表示未来的一种条件，从句中可以加时间状语。 e.g.If yo u can’t come tomorrow, we can hold the party a little later.明天你如果不能来，我们可迟一点举行宴会。
if条件句专项练习
If条件句练习 一、单项选择 1. If I _____ where he lived, I _____ a note to him. A. know, would have sent B. had known, would have sent C. know, would send D. knew, would have sent 2. Mary is ill today. If she _____, she _____ absent from school. A. wer e not ill; wouldn’t be B. had been ill; wouldn’t have been C. had been ill; should have been D. hadn’t been ill; could be 3. Alan ___ the party if he had gone to London. A. would have missed B. had missed C. would miss D. missed 4. If you had enough money, what _____? A. will you buy B. would you buy C. would you have bought D. will you have bought 5. If Mr. Y oung _____ with justice, he _____ such a wrong thing. A. were treated; wouldn’t do B. had been treated; wouldn’t have done C. were treated; wouldn’t have done D. had been treated; wouldn’t do 6. What _____ if there _____ no light during the day? A. will happen; was B. would happen; is C. happens; were D. would happen; were 7. If I knew you were coming, I ___ you at the airport. A. had met B. met C. would meet D. would have met 8. If it _____ not for the fact that you _____ ill now, I would surely punish you. A. is; are B. were; were C. were; are D. was; were 9. Many Chinese movie stars now have given up their Chinese nationality. If I were them, I _____ that. A. shouldn’t do B. didn’t do C. hadn’t done D. won’t do 10. If only I ___ to my parents! (But I didn’t.) A. listened B. had listened C. should listen D. would listen 11. I ___ you some money, but I hadn’t got any then. A. would lend B. would have lent C. could lend D. may have lent 12. If Henry had not pulled his cap low over his brow, he _____ by the police. A. might be recognized B. might have been recognized C. would have recognized D. was to have been recognized
if真实条件句语法及练习
一．一般现在时 1. 1含be动词的一般现在时 1.含义：表示一般性，经常性的动作或一般性事实。 2.谓语动词的构成：am / is / are 3.句型： 1). 肯定句：主语＋be动词＋其他。 注意：句子的第一个单词的首字母大写; 句末加实心点。 2). 否定句：主语＋be动词＋not ＋其他。 注意：句子的第一个单词的首字母大写; 在be动词后面加not ; 句末加实心点。 3). 一般疑问句：Be动词＋主语＋其他 注意：把be动词提前; 句子的第一个单词的首字母大写; 第一人称改为第二人称;④句末加问号。 肯定回答：Yes, 主语＋be 动词。 否定回答：No, 主语＋be 动词＋not. 4).特殊疑问句：特殊疑问词＋一般疑问句 含实义动词的一般现在时 1.含义：表示现在的事实或状态表示现在的习惯或反复的动作 2.谓语动词的构成：do/does 3.动词的第三人称单数形式的变化形式（动词的适当形式） 一般情况下，直接在动词后面加s。例：want - wants 以s,x,sh,ch,o结尾的动词，加es。例：wash - washes ; go - goes; do - does 以辅音字母加y结尾的动词，变y为i再加es。例：try - tries 4.句型： 肯定句: 主语＋动词原形＋其他。（主语非三单） 主语＋动词的适当形式＋其他。（主语是三单） 否定句: 主语＋do＋not＋动词原形＋其他。（主语非三单） 主语＋does＋not＋动词原形＋其他。（主语是三单） 一般疑问句：Do＋主语＋动词原形＋其他（主语非三单） 肯定回答:Yes, 主语＋do. 否定回答:No, 主语+do+not. Does＋主语＋动词原形＋其他（主语是三单） 肯定回答：Yes,主语+does. 否定回答: No, 主语＋does＋not. 特殊疑问句：特殊疑问词＋一般疑问句 二、
初中英语语法——If引导的条件状语从句(讲解及练习).
初中英语――条件状语从句（讲解&练习） Ⅰ条件状语从句的定义 Ⅱ条件状语从句的引导词 1.if引导的条件状语从句 表示在某种条件下某事很可能发生。 If we pay much attention to the earth, we'll have a better world. 如果我们多关爱地球，就会拥有一个更美好的世界 If it rains tomorrow, what shall we do? 如果明天下雨，我们怎么办？ 注意：if还可以引导虚拟条件句，表示不可实现的条件，从句中多用一般过去时或过去完成时。 What would happen if there were no water ? 如果没有水会怎样？ 2.unless引导的条件状语从句 unless的意思是如果不，除非。可与if...not互换。 You will fail in English unless you work hard. 你英语考试会不及格的，除非你更加努力。 3.as /so long as引导的条件状语从句 as /so long as意思是“只要” So long as you're happy,i will be happy. 只要你高兴，我就高兴。 Ⅲ条件状语从句的种类 Ⅳ条件状语从句的时态原则 注意： 学习" if " 引导的条件状语从句的用法,现在总结一下: 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。 条件句表真实，主将从现要遵从； 条件句非真实，虚拟语气用到位。
练习 Ⅰ.单项选择 （）1.If you _____ to the part y, you’ll have a great time. A. will go B. went C. go D. going （）2. I ____ her the answer if she ____me. A. can tell, will ask B. will tell, will ask C. would tell, ask D. will tell, asks （）3. – What are you going to do tomorrow? --We’ll go to the library tomorrow if it ___. A. isn’t rain B. rain C. won’t rain D. doesn’t rain （）4. What will you do if you _____ to the old folk’s home? A. go B. went C. going D. will go （）5．I’ll give the book to him if he ___ here next Sunday. A. will come B. comes C. is coming D. came Ⅱ.用所给词的适当形式填空 6..If you ________(feel) tired, you _______________ (have) to have a rest. 7. Where _______ he _________(see) the film if he ________________(have) time? 8. If there __________(be) fewer trees, there _______________( be) more pollution. 9. If Marcia _____________(live) alone, she ___________________( keep) a pet parrot. 11. Lana ________________( buy) a new dress if the old one ____________(be) out of style. 12.The twins ______________(fight) if they_______________(argue). 13. I ____________(have) a bake sale if I _____________(need) money for education. 14. Peter _____________( send) me a beautiful souvenir if he ________________(tour) Spain. 15. I ____________(go) to the beach if it________________ ( not rain) this week. 17. __________they __________( have) a match if the P.E. teacher _____________(be) busy? 18. If she ____________(get) up late, she _____________ ( not catch) the early bus. Ⅲ.翻译下列句子 19..如果他到的晚了会发生什么事情？ What _______________ if he _____________ late? 20. 如果努力学习，你就会取得好成绩。 If you__________ _________, you good marks. 21. 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. 22. 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. 23. 如果明天不下雨，我会和你一起去公园的。
中考复习 if条件句
教案 讲义 学生：任课教师：
If条件状从句练习巩固练习 一、单项选择 （）1.If you _____ to the party, you’ll have a great time A. will go B. went C. go D. going
（）2.–What are you going to do tomorrow? --We’ll go to the library tomorrow if it ___. A. isn’t rain B. rain C. won’t rain D. doesn’t rain （）3. What will you do if you _____ to the old folk’s home visit? A. go B. went C. going D. will go （）4. If I eat ____ food, I’ll be very fat. A. too many B. many too C. too much D. much too （）5. I’ll give the book to him if he ___ here next Sunday. A. will come B. comes C. is coming D. came （）6. I ____ her the answer if she ____me. A. can tell, will ask B. will tell, will ask C. would tell, ask D. will tell, asks （）7. We’ll go to the farm and help the farmers with the apple-picking if it ____ tomorrow. A. won’t rain B. will be rainy C. doesn’t rain D. isn’t raining （）8. There is going to _______ a sports meeting next week. If it ________, we’ll have to cancel it. A. be, will rain B. have, will rain C. be, rains （）9. Your teacher will be unhappy if you _______ to school late. A. come B. will come C. are coming D. came （）10．I don’t know if he __. If he __ , please let me know. A. comes, comes B. will come, will come C. will come, comes D. comes, will come （）11．You will stay healthy _______ you do more exercise, such as running and walking. A. if B. how C. before D. where （）12. If she here tomorrow, I will tell you. A. comes B. will come C. come D. came （）13. I’m waiting for my friend. , I’ll go shopping alone. A. If she comes B. If she doesn’t come C. If she won’t come （）14. —Tom wants to know if you will have a picnic tomorrow. —Yes. But if it ______, we’ll play chess instead. A. will rain B. rained C. is raining D. rains （）15. If Tom _____ the game, we'll give him a surprise". A. win B. wins C. won D. miming 二、用所给词的适当形式填空。 1.If you ________(feel) tired, you _________ (have) to have a rest. 2. Where _____ he ____(see) the film if he _________(have) time? 3. If there ____(be) fewer trees, there _______( be) more pollution. 4. He ___(dress) more casually if he ___( not work) on weekends. 5. If Marcia _______(live) alone, she _______( keep) a pet parrot. 6. Lana _____ buy) a new dress if the old one ____(be) out of style. 7.The twins _______(fight) if they__________(argue). 8. I ______(have) a bake sale if I ____(need) money for education. 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. 12. _____they ___( have) a match if the P.E. teacher __(be) busy? 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. 三．完成句子。 1.如果他到的晚了会发生什么事情？What ______ _____ if he ____ late?
if可以引导真实条件句和虚拟条件句
Unit 4 一. if 条件句 if可以引导真实条件句和虚拟条件句。真实条件句表示在假设的条件下，能够实现的情况。在这种情况下，主句和从句的谓语动语随各自的人称和时态发生变化，同时if条件句遵循“主将从现”的原则，即主句用一般将来时，从句用一般现在时表将来。 If it doesn’t rain tomorrow, we will go for a picnic. 如果明天不下雨，我们去野餐。 如果if条件句用来描述说话人认为与事实相反的内容，或仅是一种愿望，假设、猜测等，我们称为虚拟条件句。 If I got rich , I would travel around the world. 如果我有钱了，我将周游全世界。 1. —I often get nervous when I have an English class. What should I do?
—If I were you, I . (ask the English teacher for help) 2. —What would the earth be like if there ?(is no air or water on it) —It could be like the moon without any living things. 3. If it ,the crops would be saved. (is to rain tomorrow) 4. If we had found him earlier, we .(solve the problem more easily) 5. If I hadn’t been so busy, I .(take part in the party) 四、单选。 ( )1. If my father here now, he tell me what to do. A. were, would B. were, will C. is would D. is will ( )2. If I a bee, I work much harder. A. were, would B. were, shall C. had, will D. have, should ( )3. If I much money, I buy a house. A. have, will B. had, would C. had, will D. have, should ( )4. He learn more quickly if he harder. A. will, work B. would , worked C. would, work D. will, worked ( )5. If I you, I do that. A. was, wouldn’t were, wouldn’t C. am, won’t D. were, won’t ( )6. It’s quite impossible that it will rain tomorrow. But if it ,I would still go to the park. A. should rains B. would rain C. rained D. had rained 五、汉泽英 1. 如果我是你，我会帮助她。If I you, I her. 2. 如果我以前去过那个地方，我就认识路了。（和相反） If I to the place before, I the way. 3. 万一你明天迟到了，我们就不等你了。（和相反） If you tomorrow, we for you.=If you late tomorrow, we for you. 4. 如果没有空气，地球上就不存在生物。 If there no air, there no living things.
if条件状语从句练习及答案
if_条件状语从句的时态练习及答案_初中习题集 I.单项选择 1.If you _____ to the party, you’ll have a great time. a. will go b. went c. go d. going 2.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. with 5．I____ her the answer if she ____me. a. can tell, will ask b. will tell, will ask c. would tell, ask d. will tell, asks 6. – what are you going to do tomorrow? --we’ll go to the library tomorrow if it ___. a. isn’t rain b. rain c. won’t rain d. doesn’t rain 7.—Do you know when he will come back tomorrow? --sorry, I don’t know. when he ____ back, I’ll tell you. a. comes b. will come c. come d. may come 8. what will you do if you _____ to the old folk’s home visit? a. go b. went c.going d. will go
if条件状语从句专练
If条件状语从句专练 1. If I ___(go) to the party, they ___(be) upset. 2. If I ___(take) a taxi, it ___(be) too expensive. 3. If she ___(finish) work early, she can go home. 4. If the weather is fine, we ____(go) for a walk. 5. If I ___(have) time tonight, I will finish the book. 6. If it ___(rain) next Sunday, we won`t be able to plant trees. 7. If she ___(arrive) home, she will phone
me. 8. Unless you speak to him first, she ___(not speak) to you. 9. If he ___ (call) to you, tell him I will ring back. 10. I don`t know if it ___(rain) tomorrow. 11. Have a rest if you ___(be) tired. 12. Don`t come unless I ___(call) you. 13. I don`t know if he ___(come) tomorrow, but if he __(come), I`ll let you know. 宾语从句与状语从句混合 1. ——Helen, do you know if Martin
if引导的一般条件句.
If 引导的一般条件状语从句 --------By the teacher: Jerry Zhang 条件状语从句 概念：在复合句中，由从句表示的状语叫做状语从句。它可以用来修饰主语中的动词.形容词.副词等。根据它表达的意思，状语从句可以分为时间状语从句，地点状语从句，条件状语从句，比较状语从句，目的状语从句，结果状语从句和让步状语从句等。由连接词if或unless引导的状语从句叫做条件状语从句。（注意：在含有条件状语从句的复合句中，如果主句是一般将来时态，从句要用一般现在时[主将从现原则] 经典语句：If it doesn't rain tomorrow, we will go to the zoo. If you open the door，I will come in. if 引导的条件状语从句 主句用一般将来时，if 从句用一般过去时。 We will go to the park if it is fine tomorrow.如果明天天好的话我们就去公园。 We will go traveling if we have time tomorrow.如果明天我们有时间我们就去旅行。 主句祈使句，if 从句用一般现在时。 Please call me if you need help. 如果你需要帮助请打电话给我。 Sing a song if you feel happy. 如果感到快乐就唱首歌吧！ 主句含有情态动词，if 从句用一般现在时。 You can make a lot of money if you run a company.如果你经营一家公司的话你会装很多钱。 You can get number one if you study hard. 如果你努力学习你就可以得第一。 —Mary, what about going boating if it doesn’t rain? 玛丽，如果明天不下雨，我们就划船好吗？ —Good idea. 好主意。 Unit5练习题：单词 1. If you wear your j___________ to school, the teacher won’t let you in. 2. If you bring food to school, the teacher will t_________ it away. 3. If you are on duty, you must c____________ up the classroom. 4. The f__________ in the garden smells nice. 5. I want to have a birthday party, please help me o___________ it.
if条件句和should的用法
If 引导条件句的用法 1、真实条件句用于陈述语气，假设的情况可能发生，其中if 是如果的意思。时态关系 句型：条件从句主句 一般现在时shall/will + 动词原形 If he comes, he will bring his violin. 典型例题 The volleyball match will be put off if it ___. A. will rain B. rains C. rained D. is rained 答案B。真实条件句主句为将来时，从句用一般现在时。 注意： 1）在真实条件句中，主句不能用be going to表示将来，该用shall, will. (错) If you leave now, you are never going to regret it. (对) If you leave now, you will never regret it. 2）表示真理时，主句谓语动词便不用shall (will) +动词原形，而直接用一般现在时的动词形式。 2 非真实条件句 1）时态：可以表示过去，现在和将来的情况。它的基本特点是时态退后。 a. 同现在事实相反的假设。 句型：条件从句主句 一般过去时should( would) +动词原形 If they were here, they would help you. b. 表示于过去事实相反的假设。 句型：条件从句主句 过去完成时should(would) have+ 过去分词 If she had worked harder, she would have succeeded. The rice would not have been burnt if you had been more careful. If my lawyer had been here last Saturday, he would have prevented me from going. If he had come yesterday, I should / would have told him about it. 含义：He did not come yesterday, so I did not tell him about it. If he had not been ill and missed many classes, he would have made greater progress. 含义：He was ill and missed many lessons, so he did not make greater progress. c. 表示对将来的假想 句型：条件从句主句 一般过去时should+ 动词原形 were+ 不定式would + 动词原形 should+ 动词原形
if条件句讲解及练习
i f条件句讲解及练习
IfIwereyou,Iwouldnotletoutthesecret. 如果我是你的话，我不会泄露这个秘密的。 IfIknewhisnewaddress,Iwouldtellyou. 如果我知道他的新地址，我会告诉你的。 Ifhestudiedharder,hewouldpasstheexam . 如果他学习再努力点的话，他会通过考试的。 Ifwehadmadefullerpreparation,weshoul dhavewonthegame. 如果我们做了更充分的准备的话，我们肯定就赢了这场比赛。
Ifyouhadtakenmyadvice,you wouldn’tha vebeenlateforthemeeting. 如果你听了我的建议，你开会就不会迟到了。 Ifshewereto/shouldcome,Iwouldtellherth esecret. 万一她来的话，我会告诉她这个秘密。 （2）省略if的虚拟条件句 在含有were,had,或者should等词的虚拟条件句中，可以省略if,将were,had或者should这些助动词放在句首。如： WereIyou,Iwouldnotletoutthesecret. Hadwemadefullerpreparation,weshould havewonthegame.
Had youtakenmyadvice,youwouldn’thav ebeenlateforthemeeting. Shouldshecome,Iwouldtellherthesecret. 高一语法练习（四）预测、if条件句及虚拟语气 一、单项选择 1.IfI_____wherehelived,I_____anotetohi m. A.know,wouldhavesent B.hadknown,wouldhavesent C.know,wouldsend D.knew,wouldhavesent 2.Maryisilltoday.Ifshe_____,she_____ab sentfromschool. A.werenotill;wouldn’tbe B.hadbeenill;wouldn’thavebeen