if条件状语从句-语法省公共课一等奖全国赛课获奖课件.pptx

If从句（条件状语从句）从句（条件状语从句）第1页Complete the sentences with the correct form of the words.1.If you _(listen)to the music,_(buy)a CD.2.If he_(be)late for school,_(not wait)for him.3.If you _(buy)a new camera,_(get)a good one.4.If the light _(not come)on,_(wait)for one minute.isbuygetdoesnt comewaitdont wait listenbuy第2页祈使句祈使句+if条件状语从句条件状语从句 if条件状语从句，条件状语从句，+祈使句（从句后加逗号）祈使句（从句后加逗号）if条件状语从句要用普通现在时。条件状语从句要用普通现在时。句型结构句型结构时态时态If 条件状语从句（条件状语从句（1）第3页LetssingthesonginChinese:If you are happy第4页Whatwillyoudoifyourehappy?vIfImhappy,Iwill_.vIfImhappy,Iwill_.vIfImhappy,Iwill_.vIfImhappy,Iwill_.clapmyhandsstampmyfeetwinkmyeyesnodmyhead第5页If Im hungry,I will_.If Im tired,I will_.Look and sayeat some foodhave a rest第6页If Im ill,_.I will see a doctorLook and sayIf Im late,_.I will say sorry 第7页If it rains tomorrow,I_.will watch TV at homeIf it _ tomorrow,_.Ill play basketballdoesnt rainI wont_.play basketball第8页Ifyouarefreethisweekend,whatwillyoudo?IfIamfree,sleepwatch TVplay computer gamespractice第9页if条件状语从句条件状语从句(2)句子特点：句子特点：1.if从句中用普通现在时，表示未来一个条件，从句中用普通现在时，表示未来一个条件，从句中能够加时间状语。从句中能够加时间状语。2.当当if表示未来条件时，主句中用普通未来时。表示未来条件时，主句中用普通未来时。句型结构：句型结构：主句主句+if条件状语从句条件状语从句 if条件状语从句，条件状语从句，+主句（从句后加逗号）主句（从句后加逗号）3.时态时态：if普通现在时，普通现在时，+主句普通未来时或主句普通未来时或（can/may/must+v.)第10页e.g.1.If you dont get up early,you will be late for school.你假你假如不早点起床，上学就会迟到。如不早点起床，上学就会迟到。2.If I play games on it,it will go wrong.假如我用它玩游戏，它就会坏掉。假如我用它玩游戏，它就会坏掉。3.If you finish the homework，you can go home假如你作业做完了就能够回家了。假如你作业做完了就能够回家了。4.If you want to lose weight you must/should eat less bread.假如你想减肥，你必须少吃面包。假如你想减肥，你必须少吃面包。5.If you heat ice it turns to water.(也可用也可用will turn)假如把冰加热，它就会化成水。假如把冰加热，它就会化成水。第11页vif条件句不普通条件句不普通,几个关键点记心间。几个关键点记心间。v条件句放在前条件句放在前,逗号要放句中间。逗号要放句中间。v条件句表可能条件句表可能,主句多用未来时；主句多用未来时；v条件句表事实条件句表事实,主句惯用现在时。主句惯用现在时。vif条件句有特点条件句有特点,现在时把未来替；现在时把未来替；v这个规则要切记这个规则要切记!if条件句歌诀条件句歌诀第12页1.If he_(not,do)it,I_(do)it.2.If you _(be)late for school,my teacher _(be)angry.arewill be3 If she_(win)the prize,we _(be)happy.winswill be4.If I _ (not,eat)so much,I _(get)thinner.5.If you _(tell)them,they _ (not,believe)you.dont eatwill gettellwont believe6 I _(stay)at home,If it _(rain).7.If it _(not,rain),I _(go)out.8.we _(play)football,If it is _(sun).9.If she _(become)a star,her parents _ (not,send)her away10.He _(watch)TV,if he _(be)free.will stayrainsdoesnt rainwill gowill playsunnybecomeswont sendwill watchisdoesnt dowill do第13页-Im always tired in the morning.-If you go to bed early,you wont be tired in the morning.Givingsuggestions:第14页-I get thirsty when I run.-If you take some water with you,you wont get thirsty when you run.第15页I worry so much about my schoolwork.-If you always work hard,you wont worry about your schoolwork.You should work hard!第16页 activity 1 Rewrite the sentences with if:Listen in class,or you wont understand what to do.If you dont listen in class,you wont understand what to do.1)Eat some breakfast,or youll get hungry at school.2)Hurry up!Well be late!3)Read the instructions carefully.Then youll know what to do.If you dont eat some breakfast,youll get hungry at school.If you dont hurry up,well be late.If you read the instructions carefully,youll know what to do.第17页Activity2.Complete the sentences I want to get high scores.If _(work hard/do well)you work hard,you will do well.1.-howcanIremembermyfriendsbirthdays?-If_(keepanoteinyourdiary/notforget).2.-Itslate,butIdontwanttogotosleep.-If_(notgetenoughsleep/feeltiredatschool).you keep a note in your diary,you wont forget.you dont get enough sleep,youll feel tired at school.第18页3.-IdontlikespeakingEnglishoutsidetheclassroom.-If_(notpractice/notimprove).4.-ShouldItellmyteacherIdontunderstandthehomework?-If_(nottellher/shenotabletohelpyou).5.-IsitOKifIwatchTVforsixhours?-If_(youwatchtoomuch/eyeshurt).you dont practice,you wont improve.you dont tell her,she wont be able to help you.you watch too much TV,your eyes will hurt.第19页if使用方法使用方法2.引导条件状语从句：引导条件状语从句：译为译为“假如，假如假如，假如”(1)if从句从句+祈使句祈使句(2)if从句从句+主句（普通未来时）主句（普通未来时）1.引导宾语从句引导宾语从句：译为：译为“是否是否”，表示不确定概念。，表示不确定概念。I dont know if your father can come together.Can you tell me if miss your parents?第20页e.g.If I were you,I would invite him to the party.假如假如我是你，我会邀请他参加聚会。我是你，我会邀请他参加聚会。If he had hurried,he could have caught the train.假如他抓紧点，他会赶上火车。假如他抓紧点，他会赶上火车。If I were to go abroad,I would go to America.假如我出国了，我会去美国。假如我出国了，我会去美国。3.非真实条件句（虚拟语气）非真实条件句（虚拟语气）：表示不可实现条件或：表示不可实现条件或根本不存在条件。根本不存在条件。从句多用普通过去时或过去完成时，表示对现在或从句多用普通过去时或过去完成时，表示对现在或过去一个假设。过去一个假设。第21页()6.Mikewantstoknowif_apicnictomorrow.Yes.Butifit_,wellvisitthemuseuminstead.A.youhave/willrainB.youwillhave/willrainC.youwillhave/rainsD.willyouhave/rains()7.Ireallydontknowifshe_itwhenshe_.A.finds/arrivesB.finds/willarriveC.willfind/willarriveD.willfind/arrives（）4.Idontknowif_tomorrow.A.itdoesntrainB.therainwillstopsC.therainswontstopD.itwontrain（）5.Thevolleyballmatchwillbeputoff(推迟）ifit_.A.willrainB.rainsC.rainedD.israining（）1.Becareful,ifyou_wanttomakemistakes.A.wontB.dontC.didntD.not（）2.Workhardifyou_togetagoodmark.A.wantedB.wantingC.wantD.willwant（）3.-Iwanttoknowifyou_tothepartytomorrow.-IwillifI_free.A.willcome;amB.come;amC.willcome;willbeD.come;willbeexercisesBCADBCD第22页 If you have some problems in your life,what will you do?ProblemsMr Greens problem?If I have enough money,I will travel around the world第23页第24页