八年级英语it的用法教案

,期末专题练习It的用法、Therebe句型,教学内容,第一部分It的用法,概说：It是个非常简单的单词,但其用法却很灵活。,一、指代作用。It作句子的主语。,（一）It指前面已经提到过的人或事物。,1.Whatsthis?Itsachair.2.Whoisit?Itsme.,提示：it代替上文提及的原物(复数用they)；,one指代上文提及的、泛指的可数名词单数（复数ones）；,that指代上文提及的定指的可数名词单数或不可数名词（复数those）。,（二）It指时间、季节。虚义。1.Whattimeisit?Itsnine.,2.Itstimetogotoschool.Letsgo.,3.Whatdayistoday?ItsSaturday.4.Whatisthedatetoday?ItisOct.1st.5.Whatseasonisit?Itissummer.（三）It指气候。虚义。,1.Itiscoldinthisroom.,这个房间很冷。,2.Whatstheweatherliketoday?Itsfine.,今天天气怎么样？天气很好。,哈尔滨的冬天经常下雪。,3.ItoftensnowsinwinterinHarbin.（四）It指距离、情况等。虚义。,1.Itisfivekilometersfrommyhometotheschool.,从我家到学校有五千米。,2.Itisverynearfromthisshoptothat.从这个商店到那个商店很近。,3.Itisalongwaytothesea.,这离海很远。,4.Isitwellwithyou?你身体好吗？二、It作形式主语。动词不定式、动名词短语、从句在整个句中起主语作用，而这一部分用词较多，因此用it作为,形式主语，放在句首。（一）It+谓语+动词不定式,形主,真主,1.Itisdifficulttoclimbamountain.,爬山是很艰难的。,正常形式：Toclimbamountainisdifficult.2.Itisagoodhabittodomorningexercises.做早操是个好习惯。,学习英语很重要。,3.ItsimportanttostudyEnglish.（二）It+谓语+动名词短语,形主,真主,1.Itisdangerousplayingwithfire.,玩火是危险的。,学而不思则罔。和你的父母吵架是错误的。,2.Itisnouselearningwithoutthinking.3.Itiswrongarguingwithyourparents.（三）It+谓语+名词性从句,形主,真主,1.Itispitythatyoudidntseethatgoodfilm.,你没看到那部好电影真可惜。,2.Itissaidthathewillbelatetoday.据说他今天会来晚。整理：Itis/wasdifficult(easy,hard,important,useful,possible,apity,apleasure)todosth.三、It作形式宾语。It作形式宾语，代表其后所说的真正的宾语。,1.Ifinditnotsodifficulttolearnaforeignlanguage.,我发现学习一门外语并不难。,我记得我把我在北京买的书放在,2.IrememberIputitinmybagthatthebookIboughtinBeijing.书包里了。四、用于表示强调的句型中。1.ItwasherethatIfirstmethim.我初次与他见面就在这儿。,Jim每个周一教我们学习英语。,2.ItisEnglishthatJimteachesuseveryMonday.五、用于某些习语中，虚义。1.Keepatit!别松劲！干下去！2.Youllcatchit!你可小心点儿！,第二部分Therebe句型概说：Therebe结构，也就是我们平时所说的“某地有某物”，表示存在的句型。一.肯定句。Therebe+主语+地点Therearesomechairsinyourroom.二.否定句。Therebenot(any,much)+主语+地点Therearentanychairsinyourroom.三.一般疑问句。Be动词提前Isthereanychairsinyourroom?四.特殊疑问句。特殊疑问词+一般疑问句Whatarethereinyourroom?Therearesomechairsinmyroom.,Therearesixchairsinmyroom.,Howmanychairsarethereinyourroom?五.热门考点。,1.therebe与have的区别。,Therearesixchairsinmyroom.(强调某地有某物),在我的房间里有六把椅子。,我有六把椅子。,Ihavesixchairs.（强调某人拥有某物）2.be动词与名词的单、复数保持一致。,那边有一个女孩。那边有五个女孩。,Thereisagirloverthere.Therearefivegirlsoverthere.3.就近原则。,我的书包里有一只钢笔和一些铅笔。我的书包里有一些铅笔和一只钢笔。,Thereisapenandsomepencilsinmybag.Therearesomepencilsandapeninmybag.4.therebe+不定冠词+可数名词。,墙上有一张蔡依琳的照片。,ThereisaphotoofCaiYilinonthewall.（正确）ThereisthephotoofCaiYilinonthewall.（错误）5.therebe有时态变化。,Therewasanappleonthetableyesterday.,昨天在桌子上有一个苹果。,Thereisgoingtobeameetingthismorning.今天早上要开会。6.therebe的反意疑问句。,Thereisnowaterinthebottle,isthere?,瓶子里没有水，是吗？,Therearemanystudentsatschool,arentthere?,学校里有许多学生，不是吗？,六.连线中考。2003考例：1)There_afootballgamethisafternoon.(武汉市),A.willhave,B.isgoingtobe,C.has,答案：B2)Therewasnotimeforthetwinstogoshopping.(改为反意疑问句)(哈尔滨市)Therewasnotimeforthetwinstogoshopping,_?答案：wasthere3)Doyouthink_anAmericanfilmonTVtomorrow?(广西),A.isthereC.willtherebe,B.theresgoingtobeD.theresgoingtohave,答案：B4)Whatsontheplate?(吉林省)There_somebreadonit.,A.is,B.are,C.has,D.have,答案：A5)Jenny:Howmanycountries_inEurope?(台湾省)Betty:Imnotsure.,A.isit,B.isthere,C.arethey,D.arethere,答案：D【模拟试题】（答题时间：30分钟）一、仿照示例完成句子：Toruninthemorningisverygood.Itisgoodtoruninthemorning.,1.Toplaybasketballmustbefun.2.Towalkintheparkispleasant.,_,3.Tolearnanewlanguageisveryinteresting.,_,4.Toreadalongwordisdifficult.,_,_,5.Tobeinclassontimeisimportant.二、翻译下列句子：1.今天非常热。,_2.昨天是星期一。_3.从我家到学校很近。_4.正在下雨。_5.现在是七点半。_三、选择1._areadinglamponthetable.,A.Thereis,B.Therehas,C.Itis,D.Ithas,2._nocoffeeleftyesterday.,A.Itbeing,B.Therebeing,C.Itwas,D.Therewas,3.There_fivepairsintheroom.,A.were,B.is,C.are,D.was,4.There_nousetoaskhimthisquestion.,A.were,B.is,C.are,D.was,5.There_alotofpeoplewaitingforthebus.,A.are,B.is,C.were,D.was,【试题答案】一、依照示例，完成句子。1.Itmustbefuntoplaybasketball.2.Itispleasanttowalkinthepark.3.Itisveryinterestingtolearnanewlanguage.4.Itisdi