英语语法复习if宾语从句和条件状语从句课件.ppt

Grammar 语法1：正确使用that, if/whether（是否）, who, why 等疑问词引 导的宾语从句。 语法2：if（如果）引 导的条件状语从句 什么是宾语从句？ 在复合句中做宾语成分的句子叫宾语从句。 宾语从句的分类、引导词和语序 原句式引导词从句语序 陈述句 一般 疑问句 特殊 疑问句 that不变 whether /if 改为陈述句 语序 特殊 疑问词 改为陈述句 语序 宾语从句的时态 主句从句 一般 现在时 保留原来句子的时态 或根据实际情况而定 一般 过去时 一般现在时 一般过去时 现在进行时 过去进行时 一般将来时 过去将来时 现在完成时 过去完成时 任一时态 若表客观事实、普遍真理及自然现象用 一般现在时 注：that 在句中无词汇意义，在从句中不能充当成分， 在口语当中往往省略 e.g. 1. I hear (that) _. （一小时后他会回来） 2. He said (that) _. （他非常想念我们） 3. The teacher told us (that) _. （地球围着太阳转） he will be back in an hour he missed us very much the earth moves around the sun 注意：当从句是客观真理的时候，无论主句什么时态，从 句一律用一般现在时 由从属连词whether, if 引导的宾语从句 e.g. 1. I want to know _. （他是否跟我们一起去公园） 2. Ask him _. （他是否能来） 3. I dont know _.（是否要下雨） if (whether) he will go to the park with us whether (if) he can come whether it is going to rain or not 当句末为or not时，引导词只能用whether而不能用if. If 与whether 的区别 1. I dont know _ he will come or not. 2. I dont care of _ he is handsome. 3. He wondered _ to stay here the next week. 4. _ he will come is not decided. 与or not 连用只能用whether 介词后只能用whether 与to do 不定式连用只能用whether 作主语只能用whether 由连接代词what, whom, whose, which, what及连接 副词 when, where, how, why引导的宾语从句 when well have a meeting where he is how I can get to the station why the train is late who could answer the question whose handwriting was the best in the class 1. He asked _. (谁能回答这个问题） 2. Do you know_. （他们在等谁） 3. He asked _. （谁的书法是班上最好的） 4. Please tell me _. （我们什么时候开会） 5. Can you tell me _. （他在哪儿） 6. Could you tell me _. （我该怎么去车站 ） 7. Would you tell me _（为什么火车迟到了） whom they are waiting for 把下列句子连成带宾从的复合句： 1.You sucked your finger again. ( I hear .) 2.They will go shopping tomorrow.(He told me). 3.Whose bike is this? (Does anyone know) 4. Who went fishing yesterday?(He asked) I hear that you sucked your finger again. Does anyone know whose bike this is? He told me that they would go shopping tomorrow. He asked who went fishing yesterday. 5. How old is he ?( She doesnt know) 6. Has he returned to America?(I want to know) 7. Can Mike drive a car?(Could you tell us) 8.Did Alice work out the problem by herself? (Please tell me) She doesnt know how old he is. I want to know if he has returned to America. Could you tell us if Mike can drive a car? Please tell me if Alice worked out the problem by herself. 用法： 1. 如果主句是祈使句，从句要用一般现在时 。 Dont go and play football if you dont finish your homework. Please call me if he comes next Sunday. if （如果）引导的条件状语从句: 2. 如果主句是一般将来时， if从句则用一般现在时。 If it rains（从句）， I will stay at home. Ill go with you if you dont want to go alone（从句）. 3.如果主句含有must, may, can 等情态动 词，if从句也要用一般现在时。 If you drive too fast, you may have an accident. You must stop if the traffic is red. 1.If you _ (want) to listen to music, _ (choose) a CD. 2.If you _ (buy) a new camera, _(get) a good one. 3.If the light _ (not come) on, _ (wait) for one minute. 4.If it _ (not work) , _ (wait) a minute and then _(try) again. 5.If you _ (not know) how to use the camera, _ (read) the instructions. wantchoose buy get doesnt comewait doesnt workwait try dont know read Complete the sentences. 2.You may _ (pass) the exam if you _ (study) hard. 4.He asked us if everybody _(be) here. rains will stay pass study was 3. If you want to record, _(press) the red light. press 1.If It_ (rain) tomorrow, I _(stay) at home. Fill in the blankets with the proper form Have a try 用括号内所给词的正确形式填空 1.If the rain _(stop) tonight, we will go to the cinema. 2.Ill buy a computer if I _(have) enough money. 3.You _(not get) nervous if you _(do ) enough exercise. 4.If she _ (be) kind to me , I _(not argue) with her. 5.I want to know if he _(come) tomorrow, if he _(come), I _(give) the massage to him. s