Module 5 语法讲练：if引导的条件状语从句的用法 2025-2026学年外研版（2012）英语九年级上册

Module 5 if引导的条件状语从句 从本模块起,我们开始学习if引导的条件状语从句。我们首先学习"if从句+祈使句"结构,相当于汉语的"如果……,就……"。我们来看几个例句: If you want to go, please tell me. 如果你想去的话,请告诉我一声。 If you want to know more about it, call now. 如果你想了解更多内容,现在就打电话吧。 If you want to know what to see, look at the guide. 如果你想知道有什么可看的,就读一下指南吧。 从例句中可以看出,if引导的条件状语从句不是指已经发生的事件,而是指能够发生或可能发生的事件。 (1) if 从句的位置 if 引导的从句可以放在主句之前,也可以放在主句之后。例如: If you ever go to London, make sure you visit the Science Museum. 如果你去伦敦,一定要去参观科学博物馆。 这个句子可以改写为: Make sure you visit the Science Museum if you ever go to London. 当if从句放在主句之前时,通常用逗号与主句隔开;当if从句放在主句之后时,一般不需要逗号。 (2) if 从句的用法 本模块主要学习并运用"if从句+祈使句"这种结构来表达建议。比如说,如果对方生病了,你建议他去看医生,就可以说: If you do not feel well, please go to see the doctor. 你如果感觉不舒服,就去看医生吧。 在if引导的条件状语从句中,即使表示将来的情况,从句也要用一般现在时,而主句用祈使句或将来时。例如: If it rains tomorrow, we will cancel the picnic. 如果明天下雨,我们就取消野餐。 If you see him, tell him to call me. 如果你见到他,让他给我打电话。 Module 5 if引导的条件状语从句 习题 一、连词选择题:选择正确的连词完成条件状语从句 1. _ you need help, just call me. A. Because B. If C. Although D. So 2. _ you see Mary, tell her to come to my office. A. If B. Because C. Although D. So that 3. Please turn off the lights _ you leave the room. A. if B. because C. although D. so 4. _ you don't understand, ask the teacher. A. Because B. So C. If D. Although 5. _ you finish your homework, you can watch TV. A. If B. Because C. Although D. So that 6. Don't be late _ you want to see the beginning of the movie. A. because B. so C. if D. although 7. _ you have time, visit the museum. A. Because B. So C. If D. Although 8. Please be quiet _ you enter the library. A. if B. because C. although D. so that 9. _ you feel tired, take a rest. A. Because B. So C. If D. Although 10. _ you don't know the word, look it up in the dictionary. A. Because B. So C. If D. Although 二、句型转换题:按要求转换句子结构 1. You should see a doctor if you feel sick. (改为祈使句) 2. If you have questions, you can ask me. (改为祈使句) 3. Please close the window if you feel cold. (将if从句置于句首) 4. If you finish early, you may leave. (改为祈使句) 5. You must show your ticket if you want to enter. (改为祈使句) 6. If you need more information, check the website. (将if从句置于句末) 7. You should read the instructions if you don't know how to use it. (改为祈使句) 8. If you see him, please give him this message. (将if从句置于句末) 9. You must be careful if you cross the road. (改为祈使句) 10. If you want to keep healthy, exercise regularly. (将if从句置于句末) 三、时态填空题:用括号中动词的正确形式填空 1. If it _ (rain) tomorrow, we will cancel the picnic. 2. If you _ (see) him, tell him to call me. 3. Please call me if you _ (need) any help. 4. If he _ (arrive) late, we will start without him. 5. Don't forget to turn off the lights if you _ (leave) the room. 6. If she _ (not come) to the party, I will be very disappointed. 7. If you _ (finish) your work early, you can go home. 8. Please wait here if you _ (want) to see the manager. 9. If they _ (not study) hard, they will fail the exam. 10. If you _ (have) time, please visit us. 四、句子排序题:将单词重新排列成正确的句子 1. if / feel / you / tired / rest / a / take 2. the / if / miss / want / don't / to / train / hurry / you 3. call / if / need / me / you / help 4. early / finish / if / can / leave / you / you 5. window / close / cold / if / feel / the / you 6. careful / road / cross / if / be / the / you 7. instructions / don't / read / if / know / the / you 8. ticket / show / want / if / enter / to / your / you 9. doctor / if / sick / see / feel / a / you 10. website / information / check / if / more / the / need / you 五、改错题:找出下列句子中的错误并改正 1. If you will see him, tell him the news. 2. If you feeling tired, take a break. 3. If you wanted to succeed, work hard. 4. If you will come tomorrow, bring your book. 5. If it will rain, we will stay at home. 6. If you having problems, ask for help. 7. If she will be late, we will start without her. 8. If you not understand, ask me. 9. If they will arrive early, we can have lunch together. 10. If you wanting to go, tell me. 六、情景应用题:根据情景用"if从句+祈使句"结构给出建议 1. 有人迷路了: _ 2. 有人感觉不舒服: _ 3. 有人不知道如何使用新手机: _ 4. 有人想提高英语水平: _ 5. 有人在图书馆里大声说话: _ 6. 有人明天有重要考试: _ 7. 有人想去参观博物馆: _ 8. 有人想保持健康: _ 9. 有人遇到技术问题: _ 10. 有人想了解最新消息: _ 答案部分 一、连词选择题 1-B, 2-A, 3-A, 4-C, 5-A, 6-C, 7-C, 8-A, 9-C, 10-C 二、句型转换题 1. If you feel sick, see a doctor. 2. If you have questions, ask me. 3. If you feel cold, please close the window. 4. If you finish early, leave. 5. If you want to enter, show your ticket. 6. Check the website if you need more information. 7. If you don't know how to use it, read the instructions. 8. Please give him this message if you see him. 9. If you cross the road, be careful. 10. Exercise regularly if you want to keep healthy. 三、时态填空题 1. rains 2. see 3. need 4. arrives 5. leave 6. doesn't come 7. finish 8. want 9. don't study 10. have 四、句子排序题 1. If you feel tired, take a rest. 2. Hurry if you don't want to miss the train. 3. Call me if you need help. 4. If you finish early, you can leave. 5. Close the window if you feel cold. 6. Be careful if you cross the road. 7. Read the instructions if you don't know. 8. Show your ticket if you want to enter. 9. See a doctor if you feel sick. 10. Check the website if you need more information. 五、改错题 1. will see see 2. feeling feel 3. wanted want 4. will come come 5. will rain rains 6. having have 7. will be is 8. not understand don't understand 9. will arrive arrive 10. wanting want 六、情景应用题(参考答案) 1. If you are lost, ask a policeman for help. 2. If you don't feel well, go to see a doctor. 3. If you don't know how to use the new phone, read the manual. 4. If you want to improve your English, practice speaking every day. 5. If you are in the library, keep quiet. 6. If you have an important exam tomorrow, go to bed early tonight. 7. If you visit the museum, don't forget to see the special exhibition. 8. If you want to keep healthy, eat more vegetables and fruits. 9. If you have technical problems, restart the computer. 10. 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