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中考条件句讲解
一、条件句
（1） 真实条件句
连接词 条件从句 结果从句
If If + 主语 + 一般现在时 一般将来时---表可能：If he runs, he’ll get there on time.
may/ might/ can---允许/能力：If it stops snowing, we can go out.
must/ should---命令，请求，劝告：If you want to lose weight, you must/ should eat less bread.
一般现在时---客观事实：If you heat ice, it turns to water.
（二）虚拟条件句
虚拟语气表示一种假设的情况，或一种主观的愿望，即动词所表示的动作或状态并非事实，或不可能实现。英语虚拟语气的形式有下列几种：?
1、与现在事实相反
连接词 条件从句 结果从句
If If + 主语 + 一般过去时（be动词一般用were） 主语+ should/would/ could/ might +动词原形
如：
If he had the time, John would make a trip to China to see the Great Wall.
If I were you, I would give up drinking immediately(立即、立刻).?
If I didn’t have a cold, I would go to your birthday party.
2.与将来事实相反
连接词 条件从句 结果从句
If If + 主语 + should/would/were to+动词原形 主语+ should/would/ could/ might +动词原形
如：
If you should lose, what would you do?
If I were to see her tomorrow, I would tell her the truth.
3、与过去事实相反
连接词 条件从句 结果从句
If If +主语+过去完成时（had+过去分词） 主语+should/would/could/might+ have+过去分词
如：
If I’d known that it was going to rain, I would never have gone for a walk in the country.
If I hadn’t had a cold last week, I wouldn’t have missed your birthday party.
二课后练习
( )1. I’ll go for a walk with you if it ________ tomorrow.
A. won’t rain B. doesn’t rain C. will rain D. not rains
( )2. I’m waiting for my Mum. ________, I’ll go shopping with her.
A. If she doesn’t come B. If she comes
C. If she will come D. If she won’t come
( )3. ---Tommy, do you know if Frank ________ to the zoo this Sunday if it ________?
---Sorry, I have no idea.
A. will go; is fine B. goes; is fine
C. will go; is going to be fine D. goes; will be fine
( )4. If I _______ you, I would wear the shirt and the tie.
A. am B. was C. were D. will be
( )5. What would you do if you _______ a lot of money?
A. had B. have had C. will have D. have
( )6. In Britain, you must be 18 ________ you want to drive a car.
A. why B. because C. so D. if
( )7. If I _______ you, I’d take the small apple.
A. am B. were C. was
( )8. Susan will not arrive at the airport on time _______ she hurries up.
A. once B. if C. when D. unless
( )9. If my father ________ back, please let me know.
A. comes B. will come C. come
( )10. Let’s see ___we can find some information about the city.
A. that B. if C. what D. which
( )11.If I you, I a big house.
A. was, would buy B. were, would like to buy
C. were, would buy D. was, bough
( )12.If he tomorrow, please tell me.
A. come B. comes C. will come D. came
( )13.What would you do if you the lottery( 彩票)?
A. win B. won C. are going to win D. have won
课后练习
1B。在条件状语从句中，从句不能用一般将来时，应用一般现在时，故正确答案为B。
2B
3A。结合题意“汤姆，如果天气好的话，你知道弗兰克这个星期六将去动物园吗？”可知第一个空是宾语从句，要用一般将来时，第二个空是条件状语从句，要用一般现在时，故排除B、C、D三项，选A。
4C
5A。四个选项分别是动词have的四种形式，由关键词would和题意“如果你有很多钱，你会做什么”可知这里考查虚拟语气，故选A。
6D
7B。本题考查虚拟语气的用法。表示与现在事实相反的假设，条件状语从句中的be须用were。
8D9A。考查条件状语从句的时态。因为主语是祈使句，所以从句要用一般现在时，故选A。
10B 11C 12B 13B

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