U6Grammar (2)

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1、 if 引导的条件状语从句引导的条件状语从句 (Conditional sentences)观察下列例句，总结if引导的条件状语从句的用法。If you like sightseeing,you will love Shanghai.If you walk along the Bund,you will see many old buildings.If you enjoy history and natural beauty,you will love this garden.if 引导的条件状语从句引导的条件状语从句【总结】1.if意为“_”，引导_状语从句。.当表示条件成立就可能有某种结

2、果时，如果主句用_时 ，则从句用_时，简称“主将从现”如果条件一般将来一般现在（will）主句有时可以用情态动词can1)If you visit Peoples Square,you can also see famous buildings around it,such as.2)If you go to Beijing,you can visit the Summer Place.Conditional sentencesIf you walk along the Bund，you will see many old buildings.The if-clause talks about

3、 a possible action.The main clause talks about the likely result.（从句）（主句）we can also put the if-clause after the main clause.You will see many old buildings if you walk along the Bund.Main clauseif-clause主句主句从句2.当if引导的从句在主句之前时，_逗号隔开两个句子；当主句在从句之前，则_加逗号。【例句】1)If it doesnt rain tomorrow,I will plant so

4、me flowers in my garden.2)I will plant some flowers in my garden if it doesnt rain tomorrow.用不用be free tomorrow,play basketballIf I am free tomorrow,Ill play basketball.Ill play basketball if I am free tomorrow.doesnt rain tomorrow,play footballIf it doesnt rain tomorrow,Ill play football.Ill play f

5、ootball if it doesnt rain tomorrow.finish ones homework,go swimming If I finish my homework,Ill go swimming.Ill go swimming if I finish my homework.B Carol is giving advice to Henry.What is she saying?Use the pictures and the words in brackets to help you._ the wheels round,they_ easily.(make/turn)I

6、f you makewill turn2.The seeds _in the soil.(grow/plant)will grow if you plant them3._ another wing,it _.(put on/fly)If you put onwill fly4._ your coat,you _ so cold.(put on/not feel)If you put onwill not feel5.The meat _ in the fridge.(not go bad/put)will not go bad if you put it 6.You _your classe

7、s.(see clearly/wear)will see clearly if you wearWork out the ruleThe verb in the if-clause is in(the simple present tense/the simple future tense).The verb in the main clause is in(the simple present tense/the simple future tense).A Williams mum is giving him advice about his problems.Match the half

8、-sentences from the boxes to complete her advice for him.Williams problems1.I sometimes bring the wrong books to school.If you check your timetable every night，you will know which books to bring.2.I was away from school today.I do not know what homework to do.If you call your friends,they will tell

9、you what homework to do.3.I hate getting up.I always feel tired in the mornings.If you go to bed early,you will not feel tired in the mornings.4.I do not know what this word means.If you look it up in the dictionary,you will find out its meaning.一、判断下列句子的正误，如果有误，在后面的横线上更正。1.If you will do more exerc

10、ise this summer,you will be very fit._ 2.I will go shopping,if I am free._will do do把逗号去掉把逗号去掉 3.I will build many schools for the poor children if I win a billion dollars._ 4.If you are tired,you can have a rest._ 5.My uncle visits the school if he will have time._正确正确visits will visit/can visit wi

11、ll have has 二、选择最佳答案填空。1.If he _ hard,he will get good grades.A.study B.studies C.will study D.studied 2.If your brother an umbrella,he will get wet.A.dont take B.wont take C.doesnt take Ddidnt take Bc 3.Everyone must dress up.If you _,they wont let you in.A.dont B.wont C.cant D.mustnt4.Mary will go

12、 to Sanya if she _ a five-day trip.A.have B.had C.will have D.hasAD5.If it _ tomorrow,we _ hiking.A.dont rain,will go B.will rain,go C.doesnt rain,will go D.doesnt rain,go 6.He_ if it _ fine tomorrow.A.not leave,isnt B.doesnt leave,will not C.doesnt leave,isnt D.will not leave,isnt CD 三、根据中文意思完成句子。1

13、.如果你不运动，你就会变胖。If you _ _ exercise,you _ _ _.2.如果我早点完成作业，我就会早点睡。I _ _ to bed early if I _ my homework early.3.如果植物得不到足够的水，它们就长不好。If plants _ _ enough water,they _ _ well.dont dowill get fatwill gofinishdont getdont grow 用if将句子连接起来,注意动词的适当形式。4.You are not tired.Lets go for a walk.5.We will go climbing tomorrow.It wont rain.If you are not tired,lets go for a walk.If it doesnt rain tomorrow,we will go climbing.