If引导的条件状语从句课件.ppt

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1、If引导的条件状语从句,大庆市第51中学 贺东辉,If在状语从句中的位置,If引导的条件状语从句，如下列的例子：If you know the answer,please tell me.If they come here,we will pick them up.She will send me an email if I notice her.*由此可以看出，if引导的句子放在句首，后面的句子连接中用“，”.如果放在句子当中，两个连接的句子不需要加“，”.,eg:,1)如果你看见Tom,请立刻通知我。2)如果比赛结束了，请给我打电话。1)If you see Tom,please noti

2、ce me at once.1)Please notice me at once if you see Tom.2)If the game is over,please call me.2)Please call me if the game is over.,exercise：句子改写,We will go to Harbin if it is fine tomorrow.*If it is fine tomorrow,we will go to Harbin2)If he has the book,please let me know.*Please let me know if he h

3、as the book.3)If they come here,we will be happy.*We will be happy if they come here4)Kate will watch a movie if she is free.*If Kate is free,she will watch a movie.*question:if在状语从句中的位置是怎样的呢,主从句的区分,Eg:I will bring an umbrella if it rains outside.If the car is red,I will buy two.If the ground is dry

4、,we will play football this afternoon.*上述句子中，我们把if后面引导的句子叫做从句，句子的另外一部分叫做主句。If叫引导词。,判断下列句子中的主句和从句,If you have enough money,we will buy a car.If Kate is angry,Tom will be very scared.We will laugh at him if he gets poor score.Please go home if you have any problem.Turn left if you see the red stone.*1

5、)从+主 2）从+主 3）主+从 4）主+从 5）主+从 Question:if引导的句子叫什么？另外一部分叫什么？,If引导的条件状语从句 1,If you see Tom,please tell him the news.If I cant go there,please choose another one.Hand in your paper if time is up.Go back right now if you feel tired.Question:这几个if引导的条件状语从句有什么特点？,If引导的状语从句之祈使句,上述的例子概况为 If+从句+主句（祈使句）或者 主句（祈

6、使句）+if+从句即：在主句和从句都是一般现在时态的情况下，主句用祈使句，从句用一般现在时。Eg:Pass me the ruler if you are free.If the car is cheap,buy me 2.,Choose the best answer,If Mary _(want)to eat sth,_(give)her at once.A.want,give B.wants,give C.wants,gives D.want,gives2.If Tony _(have)time,_(go)shopping with him.A.have,go B.has,go C.ha

7、s,goes D.have,goes3._(remember)all the words if he _(find)the book.A.Remember,find B.Remembers,finds C.Remembers,find D.Remember,finds,Fill in the blank,If I cant _(get)up on time,_(call)me please.If Kate _(be)singing,_(notice)her to get down at once.If she _(know)the answer,_(copy)me one._(cut)the

8、watermelon if all the guests _(be)ready._(turn)off the light if she _(go)out.,get,call,is,notice,knows,copy,Cut,are,Turn,goes,If引导的状语从句之 主将从现,看下面的句子,If you can come here,bring me a book.表示的是一种可能的情况。在这个句子中，主句用祈使句，从句用一般现在时态。可是如果句子说，“如果你不能来，我会自己去取”，该怎么表达呢？*If you cant come here,I will bring it myself.,

9、像这种从句用一般现在时，主句用将来时态的句子，就是if 引导的第二种条件状语的情况，简称“主将从现”。Eg:If you tell me the truth,I will be crazy.If she comes here,I will have lunch with her.We will take you home if our car is working.He will smoke if there is nobody.,Choose the best answer.If Mary _(fly)to Shanghai,she _(see)my uncle.A.fly，will see

10、 B.flies,will see C.will fly,sees,D.flies,see2.If Tom _(open)the box,father _(be)angry.A.opens,will be B.will open,be C.opens,is D.will open,will be3.Daming _(cook)the meal himself if mum _(be)not at home.cook,is B.will cook,will be C.will cook,isD.cook,will be,Fill in the blank,If I _(see)them,I _(

11、tell)them the result.If it _(snow),we _(go)skating.Tony _(play)football if it_(be)not cold.We _(get)the first place if nobody _(catch)us.They _(win)if the game _(be)over.Question:什么叫“主将从现”？,see,will tell,snows,will go,will play,is,will get,catches,will win,is,主将从现练习,If I _(have)enough money,I _(buy)

12、a nice car.A.have,buy B.will have,will buy C.will have,buy.D.have,will buy.If she _(read)the notice,she _(not make)the mistake.A.read,doesnt make B.will read,wont make C.will read,wont make D.reads,wont makeMary_(not go)there if nobody _(tell)her the address.A.doesnt go,tells.B.wont go,tells C.doesn

13、t go,will tell D.wont go,tell,改错,If they know the answer,they tell me how to do.I will cook myself if she will go out.We will fly to Shanghai if the day was fine.Mike will go home if there is not homework.She copies it again if the boss goes back.David will eat a lot of watermelons if he feel hungry

14、.1.will tell 2.goes 3.is 4.no 5.will copy6.feels,translation,如果你看到Tom，你就会知道真相了。如果有人跟我撒谎，我就揍他。如果你飞到月球上，你就会看到蓝色的地球。如果你在伦敦，你就会看奥运会了。如果你能早点到，我们就不会错过火车了,answer,If you see Tom,you will know the truth.If someone lies to me,I will beat himIf you fly to the moon,you will see the blue earth.If you are in London,you will watch the Olympic Games.If you can come here early,we wont miss the train.,