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1、If從句（條件狀語(yǔ)從句）主句+if條件狀語(yǔ)從句if條件狀語(yǔ)從句，+主句（從句后加逗號(hào)）if條件狀語(yǔ)從句要用一般現(xiàn)時(shí)。句型結(jié)構(gòu)時(shí)態(tài)If條件狀語(yǔ)從句IfI’mhungry,Iwill______________.IfI’mtired,Iwill_____________.LookandsayeatsomefoodhavearestIfI’mill,__________________.IwillseeadoctorLookandsayIfI’mlate,_________________.IwillsaysorryIfitrainstomorrow,I_______________
2、______.willwatchTVathomeIfit_____________tomorrow,________________.I’llplaybasketballdoesn’trainIwon’t________________.playbasketballIfyouarefreethisweekend,whatwillyoudo?IfIamfree,…sleepwatchTVplaycomputergamespracticegrammarif條件狀語(yǔ)從句(2)句子特點(diǎn)：1.if從句中用一般現(xiàn)在時(shí)，表示未來(lái)的一種條件，從句中可以加時(shí)間狀語(yǔ)。2.當(dāng)if表示未來(lái)的條件時(shí)，主
3、句中用一般將來(lái)時(shí)。句型結(jié)構(gòu)：主句+if條件狀語(yǔ)從句if條件狀語(yǔ)從句，+主句（從句后加逗號(hào)）3.時(shí)態(tài)：if一般現(xiàn)在時(shí)，+主句一般將來(lái)時(shí)或（can/may/must+v.)e.g.1.Ifyoudon’tgetupearly,youwillbelateforschool.你如果不早點(diǎn)起床，上學(xué)就會(huì)遲到。2.IfIplaygamesonit,itwillgowrong.如果我用它玩游戲，它就會(huì)壞掉。3.Ifyoufinishthehomework，youcangohome．如果你作業(yè)做完了就可以回家了。4.Ifyouwanttoloseweightyoumust/shouldeatl
4、essbread.如果你想減肥，你必須少吃面包。5.Ifyouheaticeitturnstowater.(也可用willturn)如果把冰加熱，它就會(huì)化成水。if條件句不一般,幾個(gè)要點(diǎn)記心間。條件句放在前,逗號(hào)要放句中間。條件句表可能,主句多用將來(lái)時(shí)；條件句表事實(shí),主句常用現(xiàn)在時(shí)。if條件句有特點(diǎn),現(xiàn)在時(shí)把將來(lái)替；這個(gè)規(guī)則要牢記!if條件句歌訣1.Ifhe____________(not,doit),I___________(do)it.2.Ifyou____(be)lateforschool,myteacher________(be)angry.arewillbe3Ifsh
5、e________(win)theprize,we_______(be)happy.winswillbe4.IfI_________(not,eat)somuch,I_________(get)thinner.5.Ifyou______(tell)them,they_____________(not,believe)you.don’teatwillgettellwon’tbelieve6I_________(stay)athome,Ifit__________(rain).7.Ifit____________(not,rain),I_________(go)out.8.we__
6、________(play)football,Ifitis_________(sun).9.Ifshe__________(become)astar,herparents____________(not,send)heraway10.He_________(watch)TV,ifhe______(be)free.willstayrainsdoesn’trainwillgowillplaysunnybecomeswon’tsendwillwatchisdoesn’tdowilldoExerciseTime---I’malwaystiredinthemorning.---Ifyou
7、gotobedearly,youwon’tbetiredinthemorning.Givingsuggestions:---IgetthirstywhenIrun.---Ifyoutakesomewaterwithyou,youwon’tgetthirstywhenyourun.Iworrysomuchaboutmyschoolwork.---Ifyoualwaysworkhard,youwon’tworryaboutyourschoolwork.Youshouldworkhard!Unit
