1、If 引导的引导的条件状语从句条件状语从句(复习复习)用法：1.主主将将从从现现 If it rains（从句），（从句），I will stay at home.Ill go with you if you dont want to go alone（从句）（从句）.2.主主情情从从现现 If you drive too fast,you may have an accident.You must stop if the traffic is red.3.主主祈祈从从现现 Dont go and play football if you dont finish your homework.P
2、lease call me if he comes next Sunday.1.主祈从现主祈从现 2.主将从现主将从现 if ,will/wont 3.主情（主情（can，may，should，must）从）从现现 If you feel tired must.1.Can you tell me if she can come to the meeting?2.She will not go there,if it is rainy tomorrow.3.I cant guess if she will be angry.4.If we help each other,we both will
3、 get good results.If 在宾语从句中翻译为在宾语从句中翻译为“是否是否”If 在条件状语从句中翻译为在条件状语从句中翻译为“如果如果”Ill go to see you if I am free next week.I want to know if he is a teacher.whether1.if 在句中的含义不同在句中的含义不同2.if 在从句中的位置不同在从句中的位置不同If 引导的宾语从句放在主句之后；而引导的宾语从句放在主句之后；而if引引导的状语从句可放在主句之前也可放在主导的状语从句可放在主句之前也可放在主句之后句之后=If it doesnt rain,
4、I will go out tomorrow.I will go out tomorrow if it doesnt rain.I dont know if the train has arrived.If 引导的条件状语从句放于句首时多用逗号隔开；引导的条件状语从句放于句首时多用逗号隔开；而而if引导的宾语从句则不能。引导的宾语从句则不能。3.时态要求上有区别时态要求上有区别If 引导条件状语从句的时态为一般现在时引导条件状语从句的时态为一般现在时 记住记住“主将从现主将从现”1.I want to know if there a sports meeting next month.does
5、nt rainwill be2.If it ,well hold it.If 引导的宾语从句的时态由主句及本身时引导的宾语从句的时态由主句及本身时态决定；态决定；练一练：1。如果你请求他，他会帮你的If you _him,he _ _you2。如果她早点儿起床，就有时间在家里吃早餐 If she_ _a little earlier,shell have time to eat breakfast at home.3。如果你参加聚会，你将会过得很开心。If you_ the party,you_ _ a great time.4。如果明天下雨，我们将不去野餐If it _tomorrow,we
6、 _ _ for a picnic.5。如果你经常听英文歌，你将会喜欢英语If you often _ _English songs,you_ _English.二、选择题：二、选择题：()1.If you _ him,he will help you.(2009 海南中考)A.asked B.ask C.will ask()2.I will stay at home if it _ tomorrow.(2007 海南中考)A.rain B.rains C.will rain()3.If she _ hard,She will go to Beijing University.A.study
7、B.will study C.studies()4.If he_ here tomorrow,Ill meet him.A.come B.will come C.comes()5.If she likes it,she _it soon.A.read B.reads C.will read ()6.If I _much money in the future,I will travel all over the world.A.have B.has C.will have三、用所给词的正确形式填空。三、用所给词的正确形式填空。1.If he_(not,do)it,I_(do)it.2.If y
8、ou _(be)late for school,my teacher _(be)angry.3.we _(be)happy if she_(win)the prize.4.If I _(not,eat)so much,I _(get)thinner.5.I _(not play)soccer if it _(rain).6.He _(watch)TV if he _(be)free.【2011陕西】24.If there no buying and selling of animals,there no killing in nature.A is;will he；B.will be;will
9、 be C.is;is D.will be;is【2011黑龙江绥化市】Im waiting for my friend.,Ill go shopping alone.A.If she comes B.B.If she wont come C.If she doesnt come【2011雅安】10.The students _ have a sports meeting this weekend if it _。A.wont;rains B.will;rains C.wont;will rain D.are going to;is going to rain【2011重庆江津】12.If s
10、he here tomorrow,I will tell you.A.comes B.will come C.come D.came【2011黑龙江齐齐哈尔】13.Im waiting for my friend.,Ill go shopping alone.A.If she comes B.If she doesnt come B.C.If she wont come【2011山东泰安】14.Tom wants to know if you will have a picnic tomorrow.Yes.But if it _,well play chess instead.A.will r
11、ain B.rained C.is raining D.rains【2011山东潍坊】15.If Tom _ the game,well give him a surprise.A.win B.wins C.won D.winning有关有关if引导的状从考点引导的状从考点1、主将从现主将从现If it _(rain)tomorrow,I_(go)out.2、If的两种意思（如果的两种意思（如果是否）是否）I want to know if he _(come)tomorrow,if he _(come),I _(give)the message to him.3、If 的同义句改写请观察下列
12、句子：If you get up early,you will catch the bus._ _ _,and you will catch the bus.If you dont study hard,you will not pass the exam._ _，or you will not pass the exam.从上题我们可以看出，if引导的条件状语从句是可以改写成“祈使句+and+主句”，此处的and 表示顺接。If I sleep all the time,I will not pass the exam._ _ _ _,and I will not pass the exam.这样的从句还可以改写成“祈使句+or+主句”,此处的or表示转折，翻译为“否则，不然否则，不然”。If you dont study hard,your parents will be sad._ _,or your parents will be sad.
