if條件狀語從句課件

LanguageIfsentencesIf引導的條件狀語從句if條件狀語從句好用Ifyoucool

water,itturnsintoice.①②ifclause從句mainclause主句Ifsentencesif引導的條件狀語從句if條件狀語從句好用1.Ifyouheatmetal,itmelts.如果把金屬加熱，它就會融化。2.Waterturnsintoiceifyoucoolit.如果你冷卻水，它就會變成冰。ifclause從句mainclause主句從句主句從句主句從句在主句前時，____（用/不用）逗號隔開當主句在前時，則____（用/不用）逗號不用用if條件狀語從句好用Ifyoudropaglass,itbreaks.Ifyouheatice,itmelts.Ifyoustandintherain,yougetwet.主句和從句都用_____________(時態(tài))因為if引導的條件句說的是_____________一般現在時客觀事實/普遍現象if條件狀語從句好用Actionswithdefiniteresults讀下列例句，試著自己總結if的用法：1.Ifyouheatmetal,itmelts.如果把金屬加熱，它就會融化。2.Waterturnsintoiceifyoucoolit.如果你冷卻水，它就會變成冰。3.Ifyoustandintherain,yougetwet.如果你站在雨里，就會淋濕。4.Ifyoudropaglass,itbreaks.如果你把玻璃杯掉在地上，它就會碎。if條件狀語從句好用由例句我們可以知道：如果if引導的條件句談論的是一種____________時，主句謂語動詞便不用shall/will+動詞原形，而直接用_______時的動詞形式。真理/客觀事實一般現在if條件狀語從句好用ActionswithDefiniteResultsWater________(turn)intoiceifyou__________(cool)it.Ifyou________(stand)intherain,you_________(get)wet.turnscoolstandgetif條件狀語從句好用--b--d--g--a--h--c--f--eExerciseA1if條件狀語從句好用1.Ifyou___________________water.2.Aballoon_____________________it.3.Ifyou___________________water.4.Metal_____________________it.5.Wood_________________water.6.Aglass_________________it.heatice,itturnsintoburstsifyoustickapinintocoolsteam,itturnsintomeltsifyouheatfloatsifyouputitintobreaksifyoudropExerciseA2if條件狀語從句好用Actionswithpossibleresults讀下列例句，總結if的用法：1.Ifheruns,he’llgetthereintime.如果他跑步去，就會及時趕到那。2.Hewillhelpyouifyouaskhim.如果你請他幫忙，他會幫你的。3.Ifyoufailintheexam,youwilllethimdown.如果你考試失敗了，你會讓他失望的4.Ifyougetuplate,youwillbelateforschool.如果你起床晚了，上課就會遲到。if條件狀語從句好用由例句我們可以知道：在if引導的條件狀語從句中，如果從句談論的是一個有可能發(fā)生的事實以其產生的相關結果，從句用_____________,主句用_______________.一般現在時態(tài)一般將來時態(tài)(主將從現)if條件狀語從句好用I________(stay)athomeifit_______(rain)tomorrow.Ifhe____________(notcome),I_____________

(go)swimmingalone.willstayrainsdoesn’tcomewillgoActionswithPossibleResultsif條件狀語從句好用Ifyougetuplate,youwillbelateforschool.Lookandsaygetuplatelateforschoolif條件狀語從句好用Ifthetelephonerings,Iwillanswerit.Lookandsayringanswerif條件狀語從句好用IfI

have

alotofmoney,Iwillbuyabighouse.Lookandsayalotofmoneyabighouseif條件狀語從句好用hard-workingIfshe

is

hard-working,she

will

getgoodgrades.getgoodgradesLookandsayif條件狀語從句好用gofishing.IfitissunnythisSunday,I’llgofishing.LookandsaysunnythisSundayif條件狀語從句好用P105BWilliamhasfiveproblemsGivehimsomeadvicefromcolumnAandB1Isometimesforgettotaketherightbooktoschool.Ifyoucheckyourtimetableeverynight,you’llknowwhichbookstotake.if條件狀語從句好用一、判斷正誤，如果有誤，請更正1.Ifyouwilldomoreexercisethissummer,youwillbeveryfit.

2.Thecandleburns,ifyoulightit.willdo→do把逗號去掉if條件狀語從句好用3.IwillbuildmanyschoolsforthepoorchildrenifIwinabilliondollars.4.Ifyoufreezewater,itwillturnintoice.

5.Myunclevisitsthemuseumifhewillhavetime.正確willturn→turns visits→willvisit,willhave→hasif條件狀語從句好用If

的兩個意思:

If:

“如果”“是否”引導條件狀語從句引導賓語從句Idon’tknowifhewillcometomorrow.Iwillgotothecinemaifitdoesn’train.主現從現/主將從現if可用將來時if條件狀語從句好用BettywillvisittheHistoryMuseumifit____________(rain)tomorrow.Benwantstoknowifit___________(be)finetomorrow.If引導的條件狀語從句不用將來時，意思為“如果”。If引導的賓語從句可以用將來時，意思為“是否”。doesn’trainwillbe是否如果if條件狀語從句好用Exercises:

Hewillhelpmewithmymathsifhe____free.AwasBwillbeCwouldbeDisIdon’tknow_____hewillcometomorrow.____hecomes,I’lltellyou.Aif;WhetherBwhether;WhetherCif;ThatDif;If3.Pleasetellhermytelephonenumberifshe_____(want)toknow.wantsDDif條件狀語從句好用4.Willyoucomeandstaywithusforawhileifyou______(finish)doingyourhomework?Wangdoesn’tknowifthere_________(be)anEnglisheveningnextweek.Mikeaskedmeifwe___________(ask)anyquestionsthenextclass.Wearegoingforpicnictomorrow.I’llcallWendytomakesure________.AwhytostartBwhentostartCwhattostartDwhichtostartwouldaskfinishwillbeBif條件狀語從句好用8.---Wouldyoupleasetellme____next?---Thinkitover.You’llfindagoodway.AwhentodoBhowtodoCwhattodoDwheretodo9.Idon’tknowifmyuncle_____.Ifhe___,Iwillbeveryhappy.Acomes;willcomeBwillcome;willcomeCcomes;comesDwillcome;comes10.EitheryouorI_____goingtoShanghai.Onlyonepersonmaygothere.AareBwereCamDwasCDCif條件狀語從句好用()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條件狀語從句好用()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條件狀語從句好用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條件狀語從句好用Translatethefollowingsentences:1.如果你請他幫忙,他會幫你的。Ifyouaskhim,hewillh