Unit3LanguageinuseⅠTeachingmodelRevisionandapplicationⅢTeachingaims1.Tosummariseandconsolidateif-clauseandthevocabulary.2.Tolearnthenewwords:hurryup,shelf,steal.ⅣTeachingaidsTaperecorder,OHP,handoutsⅥTeachingStepsStep1RevisionReviewthetextofUnit1andUnit2Step2Languagepractice1.Readthroughtheexamplesentencesintheboxwiththewholeclass.2.Askthemtoidentifytheelementswhichhavebeenhighlighted.(theverbsfortwoclausesofthefirstconditional).Step3Grammar语法学习：if引导的条件状语从句的用法(2)一）时态呼应一般来讲，复合句都要遵循主、从句时态呼应规律，状语从句也不例外。即主句用现在时，从句也用现在时；主句用过去时，从句也用过去的某种时态。具体地讲，主句是一般现在时(包括祈使句和含有情态动词can,may,must等)，从句也用一般现在时。例如：Haveagoodrestifyouaretired.如果你累了，就好好休息一会儿吧。Youmustseethedoctorifyouareill.如果你生病了，就必须去看医生。这里提醒大家特别要注意：如果主句是一般将来时态，这时从句不可以用将来时态，而要用一般现在时。例如：Iwon’tgotherewithyouifitrainstomorrow.如果明天下雨的话，我就不和你一起去那儿了。Ifwedonothing,therewillbeonlystandingroomontheearth.假如我们不采取任何措施，地球上将只有站的地方了。二）主从句的位置大多数情况下，从句可以位于主句之前，也可以位于主句之后。不过从句在前时，主从句之间必须用逗号隔开。例如：Pleasetellmeifhecomesback.=Ifhecomesback,pleasetellme.如果他回来了，请告诉我一声。Step4Doexercises:A.Rewritethesentenceswithif.1.Listeninclass,oryouwon'tunderstandwhattodo.2.Eatsomebreakfast,oryou'llgethungryatschool.3.Hurryup!We'llbelate!4.Readtheinstructionscarefully.Thenyou'llknowwhattodo.Answers:1.Ifyoudon'tlisteninclass,youwon'tunderstandwhattodo.2.Ifyoudon'teatsomebreakfast,you'llgethungryatschool.3.Ifyoudon'thurryup,we'llbelate.4.Ifyoureadtheinstructionscarefully,you'llknowwhattodo.B.Completethesentences.Giveadvicewiththecorrectformofthewords.1.—Iwanttogethighscores.—______________________________(workhard/dowell)2.—HowcanIremembermyfriends'birthdays?—____________________________(keepanoteinyourdiary/notforget).3.—It'slate,butIdon'twanttogotosleep.—_____________________________(notgetenoughsleep/feeltiredatschool).4.—Idon'tlikespeakingEnglishoutsidetheclassroom.—_________________________(notpractise/notimprove).5.—ShouldItellmyteacherIdon'tunderstandthehomework?—________________________________(nottellher/she/notabletohelpyou)6.—IsitOKifIwatchTVforsixhours?—_______________________________________(youwatchtoomuchTV/eyes/hurt)Answers:1.Ifyouworkhard,youwilldowell2.Ifyoukeepanoteinyourdiary,youwon'tforget3.Ifyoudon'tgetenoughsleep,you'llfeeltiredatschool4.Ifyoudon'tpractise,youwon'timprove5.Ifyoudon'ttellher,shewon'tbeabletohelpyou6.No.IfyouwatchtoomuchTV,youreyeswillhurtC.Completethesentencessothattheyaretrueforyou.1,I'llbereallyhappyif__________________________.2.We'lldowellinEnglishif______________________.3.Myparentswillbeangryif_____________________.4.IfitrainsnextSaturday,________________________.5.IfIgetsomemoneyformybirthday,______________.Step5Completetheconversationwiththewordsandexpressionsinthebox.A.Readthroughthewordsintheboxwiththewholeclass;havethemrepeatchorallyandindividuallyifyoufeelitnecessary.B.Askthestudentstodothisindividually,thencheckwithapartner.C.Callbacktheanswersfromthewholeclass,D.Checktheanswers:1.terrible2.pocketmoney3.problem4.refused5.keep6.proud7.mend8.honestStep6Completethepassageswiththecorrectfo...
