if条件状语从句_语法2.ppt
Module 5 ProblemsIf从句（条件状语从句）从句（条件状语从句）Complete the sentences with the correct form of the words.1.If you _(listen) to the music, _ (buy) a CD. 2. If he_ (be) late for school, _ (not wait ) for him.3. If you _ (buy) a new camera, _ (get) a good one. 4. If the light _ (not come) on, _ (wait) for one minute.isbuygetdoesnt comewaitdont wait listenbuy祈使句祈使句+if条件状语从句条件状语从句 if条件状语从句，条件状语从句，+祈使句（从句后加逗号）祈使句（从句后加逗号）if条件状语从句要用一般现在时。条件状语从句要用一般现在时。句型结构句型结构时态时态If 条件状语从句（条件状语从句（1）What will you do if youre happy?vIf Im happy, I will _. vIf Im happy, I will _.vIf Im happy, I will _.vIf Im happy, I will _.clap my handsstamp my feetwink my eyesnod my headIf Im hungry,I will_. If Im tired, I will_. eat some foodhave a restIf Im ill,_. I will see a doctorIf Im late,_.I will say sorry If it rains tomorrow,I_.will watch TV at homeIf it _ tomorrow,_.Ill play basketballdoesnt rainI wont_.play basketballif条件状语从句条件状语从句(2)句子特点：句子特点：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。从句中可以加时间状语。2.当当if表示未来的条件时，主句中用一般将来时。表示未来的条件时，主句中用一般将来时。句型结构：句型结构：主句主句+if条件状语从句条件状语从句 if条件状语从句，条件状语从句，+主句（从句后加逗号）主句（从句后加逗号）3.时态时态：if一般现在时，一般现在时，+主句一般将来时或主句一般将来时或（can/ may /must +v.)e.g. 1.If you dont get up early, you will be late for school .你如你如果不早点起床，上学就会迟到。果不早点起床，上学就会迟到。2. If I play games on it , it will go wrong .如果我用它玩游戏，它就会坏掉。如果我用它玩游戏，它就会坏掉。3. If you finish the homework， you can go home如果你作业做完了就可以回家了。如果你作业做完了就可以回家了。 4. If you want to lose weight，you must eat less bread. 如果你想减肥，你必须少吃面包。如果你想减肥，你必须少吃面包。1.If he_ (not, do it ), I_(do) it.2.If you _ (be) late for school ,my teacher _(be) angry.arewill be3 If she_ (win) the prize ,we _(be) happy.winswill be4.If I _ (not,eat )so much ,I _(get) thinner.5.If you _(tell) them, they _ (not,believe) you.dont eatwill gettellwont believe6 I _(stay) at home,If it _( rain).7.If it _(not,rain) ,I _( go) out.8. we _(play) football, If it is _(sun) .9.If she _(become) a star ,her parents _ (not,send) her away 10.He _(watch) TV ,if he _(be) free.will stayrainsdoesnt rainwill gowill playsunnybecomeswont sendwill watchisdoesnt dowill doif的用法的用法2.引导条件状语从句：引导条件状语从句：译为译为“如果，假如如果，假如”(1) if从句从句+祈使句祈使句(2) if从句从句+主句（一般将来时）主句（一般将来时）1.引导宾语从句引导宾语从句：译为：译为“是否是否”，表示不确定的概，表示不确定的概念。念。I dont know if your father can come together . Can you tell me if miss your parents ?e.g. If I were you , I would invite him to the party .如果如果我是你，我会邀请他参加聚会。我是你，我会邀请他参加聚会。If he had hurried ,he could have caught the train .如果他抓紧点，他会赶上火车的。如果他抓紧点，他会赶上火车的。 If I were to go abroad ,I would go to America.如果我出国了，我会去美国。如果我出国了，我会去美国。3.非真实条件句（虚拟语气）非真实条件句（虚拟语气）：表示不可实现的条件：表示不可实现的条件或根本不存在的条件。或根本不存在的条件。从句多用一般过去时或过去完成时，表示对现在或从句多用一般过去时或过去完成时，表示对现在或过去的一种假设。过去的一种假设。( ) 6. Mike wants to know if _ a picnic tomorrow. Yes. But if it _, well visit the museum instead. A. you have； will rain B. you will have；will rain C. you will have；rains D. will you have； rains ( ) 7. I really dont know if she _ it when she _. A. finds/ arrives B. finds/ will arrive C. will find/ will arrive D. will find/ arrives（ ）4. I dont know if_ tomorrow. A. it doesnt rain B. the rain will stops C. the rains wont stop D. it wont rain（ ）5. The volleyball match will be put off (推迟） if it _. A. will rain B. rains C. rained D. is raining（ ）1. Be careful, if you_ want to make mistakes. A. wont B. dont C. didnt D. not（ ）2. Work hard if you _ to get a good mark. A. wanted B. wanting C. want D. will want（ ）3. -I want to know if you_ to the party tomorrow. - I will if I_ free. A. will come; am B. come; am C. will come; will be D. come; will beexercisesBCADBCD
