if条件状语从句课件

LanguageIfsentencesIf引导的条件状语从句if条件状语从句好用Ifyoucool

water,itturnsintoice.①②ifclause从句mainclause主句Ifsentencesif引导的条件状语从句if条件状语从句好用1.Ifyouheatmetal,itmelts.如果把金属加热，它就会融化。2.Waterturnsintoiceifyoucoolit.如果你冷却水，它就会变成冰。ifclause从句mainclause主句从句主句从句主句从句在主句前时，____（用/不用）逗号隔开当主句在前时，则____（用/不用）逗号不用用if条件状语从句好用Ifyoudropaglass,itbreaks.Ifyouheatice,itmelts.Ifyoustandintherain,yougetwet.主句和从句都用_____________(时态)因为if引导的条件句说的是_____________一般现在时客观事实/普遍现象if条件状语从句好用Actionswithdefiniteresults读下列例句，试着自己总结if的用法：1.Ifyouheatmetal,itmelts.如果把金属加热，它就会融化。2.Waterturnsintoiceifyoucoolit.如果你冷却水，它就会变成冰。3.Ifyoustandintherain,yougetwet.如果你站在雨里，就会淋湿。4.Ifyoudropaglass,itbreaks.如果你把玻璃杯掉在地上，它就会碎。if条件状语从句好用由例句我们可以知道：如果if引导的条件句谈论的是一种____________时，主句谓语动词便不用shall/will+动词原形，而直接用_______时的动词形式。真理/客观事实一般现在if条件状语从句好用ActionswithDefiniteResultsWater________(turn)intoiceifyou__________(cool)it.Ifyou________(stand)intherain,you_________(get)wet.turnscoolstandgetif条件状语从句好用--b--d--g--a--h--c--f--eExerciseA1if条件状语从句好用1.Ifyou___________________water.2.Aballoon_____________________it.3.Ifyou___________________water.4.Metal_____________________it.5.Wood_________________water.6.Aglass_________________it.heatice,itturnsintoburstsifyoustickapinintocoolsteam,itturnsintomeltsifyouheatfloatsifyouputitintobreaksifyoudropExerciseA2if条件状语从句好用Actionswithpossibleresults读下列例句，总结if的用法：1.Ifheruns,he’llgetthereintime.如果他跑步去，就会及时赶到那。2.Hewillhelpyouifyouaskhim.如果你请他帮忙，他会帮你的。3.Ifyoufailintheexam,youwilllethimdown.如果你考试失败了，你会让他失望的4.Ifyougetuplate,youwillbelateforschool.如果你起床晚了，上课就会迟到。if条件状语从句好用由例句我们可以知道：在if引导的条件状语从句中，如果从句谈论的是一个有可能发生的事实以其产生的相关结果，从句用_____________,主句用_______________.一般现在时态一般将来时态(主将从现)if条件状语从句好用I________(stay)athomeifit_______(rain)tomorrow.Ifhe____________(notcome),I_____________

(go)swimmingalone.willstayrainsdoesn’tcomewillgoActionswithPossibleResultsif条件状语从句好用Ifyougetuplate,youwillbelateforschool.Lookandsaygetuplatelateforschoolif条件状语从句好用Ifthetelephonerings,Iwillanswerit.Lookandsayringanswerif条件状语从句好用IfI

have

alotofmoney,Iwillbuyabighouse.Lookandsayalotofmoneyabighouseif条件状语从句好用hard-workingIfshe

is

hard-working,she

will

getgoodgrades.getgoodgradesLookandsayif条件状语从句好用gofishing.IfitissunnythisSunday,I’llgofishing.LookandsaysunnythisSundayif条件状语从句好用P105BWilliamhasfiveproblemsGivehimsomeadvicefromcolumnAandB1Isometimesforgettotaketherightbooktoschool.Ifyoucheckyourtimetableeverynight,you’llknowwhichbookstotake.if条件状语从句好用一、判断正误，如果有误，请更正1.Ifyouwilldomoreexercisethissummer,youwillbeveryfit.

2.Thecandleburns,ifyoulightit.willdo→do把逗号去掉if条件状语从句好用3.IwillbuildmanyschoolsforthepoorchildrenifIwinabilliondollars.4.Ifyoufreezewater,itwillturnintoice.

5.Myunclevisitsthemuseumifhewillhavetime.正确willturn→turns visits→willvisit,willhave→hasif条件状语从句好用If

的两个意思:

If:

“如果”“是否”引导条件状语从句引导宾语从句Idon’tknowifhewillcometomorrow.Iwillgotothecinemaifitdoesn’train.主现从现/主将从现if可用将来时if条件状语从句好用BettywillvisittheHistoryMuseumifit____________(rain)tomorrow.Benwantstoknowifit___________(be)finetomorrow.If引导的条件状语从句不用将来时，意思为“如果”。If引导的宾语从句可以用将来时，意思为“是否”。doesn’trainwillbe是否如果if条件状语从句好用Exercises:

Hewillhelpmewithmymathsifhe____free.AwasBwillbeCwouldbeDisIdon’tknow_____hewillcometomorrow.____hecomes,I’lltellyou.Aif;WhetherBwhether;WhetherCif;ThatDif;If3.Pleasetellhermytelephonenumberifshe_____(want)toknow.wantsDDif条件状语从句好用4.Willyoucomeandstaywithusforawhileifyou______(finish)doingyourhomework?Wangdoesn’tknowifthere_________(be)anEnglisheveningnextweek.Mikeaskedmeifwe___________(ask)anyquestionsthenextclass.Wearegoingforpicnictomorrow.I’llcallWendytomakesure________.AwhytostartBwhentostartCwhattostartDwhichtostartwouldaskfinishwillbeBif条件状语从句好用8.---Wouldyoupleasetellme____next?---Thinkitover.You’llfindagoodway.AwhentodoBhowtodoCwhattodoDwheretodo9.Idon’tknowifmyuncle_____.Ifhe___,Iwillbeveryhappy.Acomes;willcomeBwillcome;willcomeCcomes;comesDwillcome;comes10.EitheryouorI_____goingtoShanghai.Onlyonepersonmaygothere.AareBwereCamDwasCDCif条件状语从句好用()11.Ifit______sunnytomorrow,I____boating.

A.isgoB.willbe,go C.is,willgoD.willbe,willgo

()12.--whatwillyoudoifit______tomorrow,

--I’llstayathomeandwatchTV.

A.rainB.rainsC.willrainD.israining

CBif条件状语从句好用()13.Ifhe______,I______himthetime. A.comes,tellB.willcome,willtell C.comes,willtellD.willcome,tell()14.Ifit______,it______cold. A.snows,willbeB.snows,is C.willsnow,willbeD.willsnow,is()15.Ifyou______astoneintowater,it______. A.put,sinksB.put,willsink C.willput,sinksD.willput,willsinkCBAif条件状语从句好用11.He_______(help)mewithmymathsifhe____(be)free.12.Idon’tknowifJim________tomorrow.Ifhe_______,Iwillbeveryglad.(come)13._____(tell)hermytelephonenumberifshe______(want)toknow.14.Ifit____(be)sunnytomorrow,I______(go)boating.

15.Ifyou______(boil)water,it_______(turn)intosteam.16.Youcan________(travel)aroundtheworldifyou________(have)money.willhelpiswillcomecomesTellwantsiswillgoboilturnstravelhaveif条件状语从句好用Translatethefollowingsentences:1.如果你请他帮忙,他会帮你的。Ifyouaskhim,hewillh