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Review：Lesson25•(Adoorbellrings.)•Sue:There'samanatthedoor.Dad.•Father:Whoisit,Sue?•Openthedoor.•Sue:It'sthepostman,Dad.•Postman:Goodmoring,Sue.•Sue:Goodmoring,postman.•Postman:There'saletterforyourmother.Andthere'saletterforyourfather.•Sue:Thankyou.•Sue:Dad!There'saletterformum,andthere'saletterforyou.•Dad:Thisisn'taletter!It'sabill.•2.Whoisit,Sue?Sue，谁呀？•it是人称代词，当不知道对方的性别时通常用it。•3.There'saletterforyourmother.•There'saletterforsb.有某人的一封信。•Therebe+n.+介词短语•This+n.+be+forsb.这是给某人的、、、。Therebe句型表示“某地存在某人/物”。它的构成形式一般为Thereare／is＋某物／人＋地点。它即可以表示某地方有什么东西，也可以表达某地方有什么人。Thereare20studentsinaclass.班里有20名学生。Thereisanappleonthedesk.桌子上有个苹果。Therearemanystudentsintheclassroom.一、Therebe句型的句式否定句：be后加not。注意肯定句中的some变为any。Thereisn’tanywaterinthebottle.瓶子里没有水。Therearen'tanystudentsintheclassroom.疑问句：be提到主语前。同样，some变为any。一般疑问句的简略肯定回答：Yes,thereis/are.否定回答：No,thereisn’t/aren’t.二、therebe句型有数的变化be的单复数取决于其后的主语，单数主语用is，复数主语全用are；如有并列主语时，be随第一主语变，即就近原则。Thereisapenandtwoerasersonthedesk.课桌上有一支钢笔和两块橡皮。Therearetwoerasersandapenonthedesk.课桌上有两块橡皮和一支钢笔。1.(2009·北京)There____manystudentsinthelibraryafterschooleveryday.A.hasB.haveC.isD.are2.There__agoat.twoducks、threecowsandsomesheepinthefarm.A.hasB.haveC.isD.are•Whatarethey?•Theyareshoes.•GymMaster:Lookattheseshoes!•Whatcolouraretheseshoes?•Theyare_____.GymMaster:Whichareyourshoes,Sandy?.•Tom:The__brown__shoes.sir.•GymMaster:Whatcolourareyourshoes,Tom?•Tom:Myshoesare_black____,Tom.•GymMaster:Hereyouare,Tom.•Tom:Thankyou,sir.•GymMaster:There'sashoeonthislocker.Whoesisit?•Tom:It'sBilly's,sir.•1.Lookattheseshoes!看这些鞋子。•these指示代词，这些，是this的复数形式，其后be动词用are。•Thesebooksareforfather。•these的对应词是those那些•指示代词口诀：•thisthese靠近我•thatthose远离我thisthat指单数thatthose指复数四者都可用the替，大家务必要牢记。•2.Whatcolouraretheseshoes?•对颜色的提问用Whatcolour•3.A:Whichareyourshoes,Sandy?B:The_brown____shoes.sir.•the是定冠词，特指前面提到的事物（shoes）•4.There'sashoeonthislocker.Whoesisit?•therebe句型•5.It'sBilly's,sir.•名词所有格Practise:•Whichisyourbook?•Whichareyourbooks?单数变复数Whichisyourbag?变复数Whichareyourbags?Thisismyclassroom.变复数Theseareourclassrooms.