初中英语条件状语从句.ppt

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1、If I get up late,I will be late for school.If I dont finish my homework,I wont go to bed.,由if引导的从句叫条件状语从句，if意为“如果”若主句是一般将来时，从句要用一般现在时。,If you join the band,you will be famous.,=You will be famous if you join the band.,Grammar,条件状语从句,If the telephone rings,I will answer it.,If you get up late,you wil

2、l be late for school.,Look and say,If you feel hungry,you should eat something.,If you feel tired,you must have a rest.,If you are ill,you must go to see a doctor.,If you are riding a bike in the street,you must be very careful.,Pair work,If you stay at home,you will be sorry.,If you work until nigh

3、t,you will be tired.,If we break the traffic rules,we will get a fine and even be in danger.,If it is fine tomorrow,we will go on a school trip.,we will climb mountains.,I will go to Beijing University.,If I study hard,If I have enough money,I will travel around the world.,If you have a robot,what w

4、ill you do?,play games,clean my bedroom,do homework for me,I will let it,Example:If I have a robot,If sentences,(1)If sb does sth,sb will do sth=sb will do sth if sb does sth,主句（将来时）,从句（一般现在时）,A：actions having results that will probably happen,(2)主句为祈使句或情态动词形式,If sb does sth,please do sthIf sb does

5、sth,sb may(情态动词)do sth,If sentences,If sb does sth,sb/sth does sth=sb/sth do sth if sb does sth,主句（一般现在时）,从句（一般现在时）,B：actions having results that will certainly happen,相当于when从句,Can if be replaced by other words?,主语的行为将导致某种必然发生的结果时,Exercises:change the following sentences into if sentences,3.Get up

6、early,not be late4.Take a fish out of water,die5.Heat metal,melt,If you get up early,you wont be late.,If you heat metal,it melts,returns,call,buy,passes,1.If she _(return)from Paris,please _(call)me.,2.If he _(pass)the test，we may_(buy)a car.,If you take a fish out of water,it dies.,条件状语丛句只有ifsente

7、nses一种吗？,C：Unless：sb will do sth unless sb does sth,if sb does not do sth,Eg:You will be late for school you now.You will be late for school you now.,unless,leave,dont leave,if,Unless sentences exercises,have toothache,clean your teeth regularlyget very hot,put the air-conditioner on soon,Unless you

8、 clean your teeth regularly,you will have toothache,If you dont clean your teeth regularly,you will have toothache,Unless you put the air-conditioner on soon,you will get very hot.,If you dont put the air-conditioner on soon,you will get very hot.,More practice,1.If you _(drop)a glass,it _(break).2.

9、He _(fail)in the exam if he _(not study)hard.3.Unless you _(leave)now,you _(be)late.4.We _(have)a barbecue unless it _(rain).5.If you _(cool)water,it _(turn)into ice.6.Hurry up,or you will miss the bus._ you dont hurry up,you _ catch the early bus.7.Study hard,or youll miss fall behind._ you study h

10、ard,you_ fall behind.8.If you dont put on your scarf,youll catch cold.Put on your scarf,_ youll catch cold.9.The insurance company would pay him 2 million yuan if the vase was stolen.The insurance company _ pay him 2 million yuan _ the vase was stolen.10.I dont know if it_ tomorrow.If it _,I wont go

11、 shopping.(rain),drop,breaks,will fail,doesnt study,leave,will be,will have,rains,cool,turns,If,wont,Unless,will,or,wont,unless,will rain,rains,Have a try 用括号内所给词的正确形式填空,1.Im 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.Ill buy a computer

12、 if I _(have)enough money.4.You _(not get)nervous if you _(do)enough exercise.5.If she _(be)kind to me,I _(not argue)with her.6.I want to know if he _(come)tomorrow,if he _(come),I _(give)the massage to him.7.If you _(pay)more attention to that,he _(not get)injured.,goes,will have,stops,have,wont ge

13、t,do,is,wont argue,comes,comes,will give,pay,wont get,8.Mr Li will be mad if we _(break)the rules.9.If it _(be)cloudy,they _(not go)there by air.10.Please let us know if he _(arrive)tomorrow.Please let us know if he _(arrive)tomorrow.11.Shall I say“Hello”when the foreigner _(come)into the classroom?12.Hell get better grades if he _(study)hard.13.If you work really hard,you _(be)famous and rich.,break,is,wont go,will arrive,arrives,请告诉我们他明天是否会来。,如果他明天来的话请告诉我们。,comes,studies,will be,14.I dont know if it_ tomorrow.If it _,I wont go shopping.(rain),will rain,rains,表是否，用将来时态,表如果，用一般现在时态,See you!,