
人教版八年级英语上册第十单元IF引导的条件状语从句.ppt
19页状语从句状语从句If 引引导的条件状的条件状语从句从句•什么是状语?什么是状语?He speaks English very well. You are very beautiful.(动词动词)(形容词形容词)(程度副词程度副词)主语谓语宾语状语 用来修饰用来修饰动词动词,,形容词形容词,,副词副词以及全句的句子成分,叫做以及全句的句子成分,叫做状语状语用作状语的通常是用作状语的通常是副词副词,,介词短介词短语语,,不定式不定式和和从句从句等状语从句u在复合句中表示的状语在复合句中表示的状语u可以用来修饰谓语(包括非谓语可以用来修饰谓语(包括非谓语动词)、定语、状语或整个句子动词)、定语、状语或整个句子 状语从句状语从句 分类分类位置位置::从句可放在主句之前或之后,但是放在主句之从句可放在主句之前或之后,但是放在主句之前须有逗号隔开前须有逗号隔开eg:如果我有足够的钱,我就去环游世界如果我有足够的钱,我就去环游世界If 引导条件状语从句 定义定义::If “如果如果, 假如假如” 它引导的句子表示某事发生所需的它引导的句子表示某事发生所需的条件,即条件,即“在在…条件下,某事才能发生条件下,某事才能发生”,在句子中充当状语,,在句子中充当状语,因此称之为条件状语从句。
因此称之为条件状语从句 If 引导的条件状语从句表示假引导的条件状语从句表示假如有从句的动作发生,就会有主句动作的发生如有从句的动作发生,就会有主句动作的发生 ))If I have enough money, I will travel around the world .=I will travel around the world if I have enough money.If条件句:条件句:条件句用于陈述语气,表示假设的情况可能发生,条件句用于陈述语气,表示假设的情况可能发生,其中其中 if 是是“如果如果”的意思主句主句一般将来一般将来时 ,从句用一般,从句用一般现在在时 构 构 成成条件从句条件从句主 句主 句时 态If+一般+一般现在在时主主语++shall/will+动词原形原形例 例 句句If he comes,he will take us to the zoo.1. 如果主句是一般将来如果主句是一般将来时,从句,从句则用一般用一般现在在时 If it rains(从句),(从句), I will stay at home. I’ll go with you if you don’t want to go alone(从句)(从句). 2.如果主句含有如果主句含有must, may, can 等情等情态动词,从句也要用,从句也要用一般一般现在在时。
If you drive too fast, you may have an accident. You must stop if the traffic is red. If you finish the homework,, you can go home.. 如果你作如果你作业做完了就可以回家了做完了就可以回家了 If you want to lose weight you must/should eat less bread. 如果你想减肥,你必如果你想减肥,你必须少吃面包少吃面包3. 如果主句是如果主句是祈使句祈使句,从句同样要用一般现在时从句同样要用一般现在时Don’t go and play football if you don’t finish your homework.Please call me if he comes next Sunday.If 引导的条件状语从句的基本用法引导的条件状语从句的基本用法:主主 句句从从 句句一般将来时一般将来时一般现在时一般现在时祈使句祈使句一般现在时一般现在时含情态动词含情态动词一般现在时一般现在时 练一练:1。
如果她早点儿起床,就有如果她早点儿起床,就有时间在家里吃早餐在家里吃早餐 If she____ ____a little earlier, she’ll have time to eat breakfast at home.2如果你参加聚会,你将会如果你参加聚会,你将会过得很开心得很开心If you____ the party ,you_____ ____ a great time.3如果明天下雨,我如果明天下雨,我们将不去野餐将不去野餐If it ______tomorrow, we _____ ____ for a picnic.4如果你经常听英文歌,你将会喜常听英文歌,你将会喜欢英英语If you often ____ ___English songs, you_______ English.gets upjoin will haverains won’t golisten towill like1.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.don’t eatwill gettellwon’t 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 stayrainsdoesn’t rain will gowill playsunnybecomeswon’t sendwill watchisdoesn’t dowill do1.I’m sure if he _____(go) to the party, he________ (have) a great time.2.If the rain ______(stop) tonight, we will go to the cinema.3.I’ll buy a computer if I ______(have) enough money.4.You _________(not get) nervous if you _____(do ) enough exercise.6.I want to know if he _________(come) tomorrow, if he _______(come), I __________(give) the massage to him. goes will have stopshave won’t getdo comes will come will give1.I __________(record) the CD for you tomorrow.2.Does she often _______(lend) money to her brother?3.The snake ___________(not appear) if you make noise.4.In the final exam, I _______(get) good marks. will record lend won’t appear will get 2.You may ______ (pass) the exam if you ___ (study) hard. rainswill stay passstudy 3. If you want to record, ________(press) the red light.press1.If It______ (rain) tomorrow, I _________(stay) at home.Fill in the blankets with the proper form 用括号内所用括号内所给词的正确形式填空的正确形式填空1.If the rain _______(stop) tonight, we will go to the cinema.2.I’ll 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. stopshave won’t getdo iswon’t argue will come comes will giveIf I’m ill,__________________. I will see a doctorLook and sayIf I’m late,_________________.I will say sorry If I’m hungry,I will______________. If I’m tired, I will_____________. Look and sayeat some foodhave a rest If it rains tomorrow,I_____________________.will watch TV at homeIf it _____________ tomorrow,________________.I’ll play basketballdoesn’t rainI won’t________________.play basketball。
