9Aunit6Grammar.ppt

Grammar Unit6 TVprogrammes Whatwillhappenifwegrowmorebamboo Ifwegrowmorebamboo giantpandaswillhavemorefood Whatwillabeardoifitisindanger Ifabearisindanger itwillattackpeople Whatwillapolarbeardoifitishungry Ifapolarbearishungry itwillcatchfishfromthewater Whatwillelephantsdoiftheyarethirsty Elephantswillwalktilltheyfindariveriftheyarethirsty Whatwilltigerdoiftheyliveinthewild Tigerswillhuntfortheirownfoodiftheyliveinthewild Whatwillmalewolvesdoifthereisdanger Malewolveswillprotecttheirfamiliesifthereisdanger 1 youareafootballfan youwillnotwanttomissthisweek sprogramme 2 youenjoysolvingmysteries youmightlikethisfilm However yougetscaredeasily donotwatchit 3 youareananimal lover youmayfeelsadaboutit If If if If if引导的条件状语从句 Ifyouareafootballfan youwillnotwanttomissthisweek sprogramme Ifyouenjoysolvingmysteries youmightlikethisfilm Ifyouareananimal lover youmayfeelsadaboutit Weputacommaaftertheif clausewhenitisthefirstpartofasentence Whatcanyoudoifyourchildbehavebadlyinapublicplace Wecanalwaysgetataxiifthere saproblemwiththecar Plasticwillmeltifitgetstoohot Wedonotuseacommaifthemainclausecomesfirst 1 Ifyoueatmyfood Iwon ttalktoyou Iwon ttalktoyouifyoueatmyfood 2 IfIdon thavefood Iwilldie IwilldieifIdon thavefood 一般现在时从句 一般将来时主句 主将从现 1 Diana willgo go goes toEuropeifshe willpass pass passes theexams 2 Thegraduates willteach teach teaches inthepoorvillageiftheMinistryofEducation willagree agree agrees soon 3 Ifthere willbe are is acaraccident they willcall call calls 110forhelpatonce if引导的条件状语从句 条件状语从句在复合句中表示主句动作发生的条件 If意思是 如果 假如 表示在某种条件下某事很可能发生 如 Ifitdoesnotraintomorrow wewillgohiking Youwillgetgoodgradesifyoustudyhard 在if引导的条件状语从句中 主句中的动词常用一般将来时 从句中的动词用一般现在时 如 Ifyouaskhim hewillhelpyou TheyaregoingtohaveapicniciftheyarefreenextSaturday if引导的条件状语从句 在if引导的条件状语从句中 主句也可含有情态动词或是祈使句 如 Ifitisfinetomorrow wecangoandflythekite Don tmisstheprogrammeifyoulikemusic 注意 在if引导的条件状语从句中 如果谈论的是某一个动作发生后势必会产生某个结果 那么主从句都用一般现在时态 e g Ifyouboilwater itbecomessteam Ifyoudropaglass itbreaks Ifyouheatmetal itmelts Ifyourun yousweat Afish die ifyoutakeitoutofwater die if引导的条件状语从句 主现从现 1 Ifhe watch theanimalcarefully he get enoughinformation 2 Ican tfinishtheworkifyou nothelp me 3 Ifyoudon tgotheretomorrow I notgo either 4 notcross theroadifthelight be red 5 Ifagiantpanda have nofood it die watches willget don thelp won tgo Don tcross is has willdie 用所给词的适当形式填空 6 Ifyou feel tired you have tohavearest 7 Where he see thefilmifhe have time 8 Ifthere be fewertrees there be morepollution 9 He dress morecasuallyifhe notwork onweekends 10 Ifyouputwoodintowater it float 漂浮 用所给词的适当形式填空 feel have will see has are willbe willdress doesn twork floats A Mum canIplaybaseballnow B Haveyoufinishedyourhomework A Oh notyet B Unlessyouhavefinishyourhomework Iwon tallowyoutoplayoutside 1 Unlessyoutakemorecare you llhaveanaccident 2 You llfailinEnglishunlessyouworkhard 3 Mybabysisternevercriesunlesssheishungry 4 Don tpromiseanythingunlessyou re100percentsure Readaloud Unless如果不 除非 我们也可以用unless来引导条件状句 unless从句遵循if从句主将从现和主现从现的情况 unless与if用法相似 相当于if not Shewillmissthetrainunlessshegetsupearly Milkquicklyturnssourunlessitisrefrigerated 牛奶如果不冷藏 很快就会变酸 Unlesshecomessoon I mgoingwithouthim Ifhedoesn tcomesoon I mgoingwithouthim 他如果不马上来 我就自己走了 Sometimeswecanuseif nottoreplaceunless e g Youwillfailtheexamunlessyouprepareforit Youwillfailtheexamifyoudon tprepareforit Hewon tknowtheword smeaningunlesshelooksitupinthedictionary Ifhedoesn tlookupthewordinthedictionary hewon tknowitsmeaning Unlesssheisbusy shewillcomeandhelpus Ifsheisn tbusy shewillcomeandhelpus 要领 unless if not 1 如果明天不下雨 我们就去远足 Ifit wewillgohiking Wewillgohiking 2 如果你不把肉存放在冰箱里 它就会变坏 Ifyou inthefridge it inthefridge it Unless If not unlessitrainstomorrow doesn traintomorrow don tkeepthemeat Unlessyoukeepthemeat goesbad goesbad Unless If not 3 除非天下雨 他通常是走路去上学 Heusually onfootifit heusually onfoot 4 如果你现在不走 你就赶不上火车了 Ifyou you thetrain you thetrain goestoschool don tleavenow Unlessitrains goestoschool Unlessyouleavenow won tcatch won tcatch doesn train if和unless的用法一般情况下 unless相当于if not 可以互换 用一般现在时代替将来时 Iwon tletyouinunlessyoushowmeyourpass Iwon tletyouinifyoudon tshowmeyourpass 如果你不出示通行证我就不让你进来 如果主句描述的是情感或情绪活动方面的内容 if not结构不能换成unless eg I llbequitegladifshedoesn tcome