福建省2015年初中英语微课一等奖——if引导的条件状语从句ppt课件.ppt

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1、If引导的条件状语从句引导的条件状语从句主讲：吴永萍主讲：吴永萍单位：漳州实验中学单位：漳州实验中学学段：初二年学段：初二年What can we learn from the traffic accident?If引导的条件状语从句引导的条件状语从句We must obey the traffic rules. If we dont obey the traffic rules, we will hurt ourselves.break the traffic rules / get a fineIf you .If you break the traffic rules, you will

2、 get a fine.If引导的条件状语从句引导的条件状语从句cross a busy road / be in dangerYou will be in danger if you cross a busy road.If引导的条件状语从句引导的条件状语从句If引导的条件状语从句引导的条件状语从句If you break the traffic rules, you will get a fine.You will be in danger if you cross a busy road.当当if 解释为解释为“如果如果, 假如假如”， 引导条件状语从句。引导条件状语从句。一、位置一、位

3、置 (可前可后可前可后, 从句在前用逗号和主句隔开从句在前用逗号和主句隔开) If he is at home, please call me. =Please call me if he is at home. 如果你骑车马虎，你会受伤。如果你骑车马虎，你会受伤。 If you ride carelessly, you will get hurt. 如果我有时间，我会去看电影。如果我有时间，我会去看电影。 I will go to see a film if I have time.1. If从句是一般现在时，主句是一般将来时。从句是一般现在时，主句是一般将来时。主将从现主将从现二、结构与时

4、态二、结构与时态 如果你生病的话如果你生病的话,你一定要去看医生。你一定要去看医生。 If you are ill, you must go to see a doctor. 如果你努力学习，你会通过考试的。如果你努力学习，你会通过考试的。 If you work hard, you can pass the exam. 2. If从句是一般现在时，主句用情态动词。从句是一般现在时，主句用情态动词。二、结构与时态二、结构与时态 如果你需要我的帮助，请告诉我。如果你需要我的帮助，请告诉我。 Please tell me if you need my help. 如果你很累就休息一下。如果你很累就

5、休息一下。 If you are tired, have a rest. 3. If从句是一般现在时，主句为祈使句。从句是一般现在时，主句为祈使句。以动词原以动词原形开头形开头二、结构与时态二、结构与时态 1) If you work harder, you can learn English well.= Work harder, _ you can learn English well.2) If you dont hurry up, you will miss the train.= Hurry up, _ you will miss the train.重难点突破重难点突破andor主

6、语为主语为you的条件状语从句可与的条件状语从句可与 “祈使句祈使句+ and / or +简单句简单句”相互转换。相互转换。表顺承表顺承表转折表转折一、改错一、改错1. If everyone will obey the traffic rules, there will be fewer accidents.2. Run faster, or you will catch the bus.3. I come to see you, if I have time.4. Well travel to Shanghai if it will be fine next week.5. Works

7、harder, or youll fail in the exam.obeysand you will catch the bus.will come to see you if I have time. isWork harderFind out the mistakes6._ to the party, and youll have fun. A. Will goB. To go C. GoD. Going 7. 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 8. -Well go to the library tomorrow if it _. A. isnt rainB. rain C. wont rain D. doesnt rain9. Be careful, _ you will hurt yourself. A. andB. or C. becauseD. so