初中英语条件状语从句

1、If I get up late, I will be late for school.If I dont finish my homework, I wont go to bed.由由if引导的从句叫条件状语从句，引导的从句叫条件状语从句，if意为意为“如果如果”若主句是一般将来时，从句要用一般现在时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条件状语从句条件状语从句 If you feel tired must .Pa

2、ir workIf you stay at home, you will be sorry.If you work until night, 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 enoug

3、h money,I will travel around the world.If you have a robot, what will you do?If you have a robot, what will you do? play games clean my bedroom do homework for meI will let itExample: 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）主句（将来时）从句（一

4、般现在时）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主句为祈使句或情态动词形式If sb does sth, please do sthIf sb does sth, sb may(情态动词情态动词) do sthIf sentences If sb does sth, sb/sth does sth = sb/sth do sth if sb does sth主句（一般现在时）主句（一般现在时） 从句（一般现在时）从句（一般现在时）B：actions having results th

5、at will certainly happen相当于相当于when从句从句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 sentences3.Get up early, not be late4.Take a fish out of water, die5.Heat metal, meltIf you get up early, you wont be late .If you heat metal,

6、 it meltsreturnscallbuypasses1. 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ifsentenses一种吗？C：Unless： sb will do sth unless sb does sth if sb does not do sthEg: You will be late for school you now. You

7、 will be late for school you now.unlessleavedont leaveifUnless sentences exercises1.have toothache, clean your teeth regularly2.get very hot, put the air-conditioner on soonUnless you clean your teeth regularly, you will have toothacheIf you dont clean your teeth regularly, you will have toothacheUn

8、less 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 practice1.If you _ (drop) a glass, it _ (break).2.He _ (fail) in the exam if he _ (not study) hard.3.Unless you _ (leave) now, you _(be) late.4.We _ (have) a barb

9、ecue 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 hard, you_ fall behind.8.If you dont put on your scarf, youll catch cold. Put on your scarf,

10、 _ 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 shopping. (rain)dropbreakswill faildoesnt studyleavewill bewill haverainscoolturnsI

11、fwontUnlesswill orwontunlesswill rainrainsHave 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 if I _(have) enough money.4.You _(not get) nervous if you _(do ) enough exercise.5.If she _ (be)

12、 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 stopshave wont getdo iswont argue comes comes will give pay wont get8.Mr Li will be mad if we _(br

13、eak) 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