StarterSection2Section3语法专项课件-be动词北师大版英语七年级上册

教学课件北师大英语七年级上册StarterSection2&Section3语法专项

Be动词

全解精讲+分层练习

学习目标1.掌握be动词（am/is/are）的正确搭配规则，适配不同人称和数2.熟练运用肯定句、否定句的基本结构及缩写形式3.掌握一般疑问句的构成、问答逻辑，能精准回应4.区分this/that/these/those作主语时的问答技巧5.能通过多样练习巩固语法，提升基础句式应用能力核心语法框架梳理本单元聚焦英语基础句式，核心围绕be动词展开三大核心内容：肯定句（陈述事实）、否定句（否定事实）、一般疑问句（Yes/No问答）be动词是连接主语和表语的关键，需根据主语灵活匹配语法难度适中，是英语句式学习的入门基础，务必扎实掌握后续复杂句式均以此为基础，需重点理解结构逻辑be动词-核心概念与功能be动词是英语中最基础的连系动词，无实际词义核心功能：连接主语和表语，说明主语的身份、状态或特征表语可是名词、形容词、介词短语等，补充主语信息例：Heisastudent.（is连接主语he和表语astudent，说明身份）例：Theyarehappy.（are连接主语they和表语happy，说明状态）be动词有三种形式：am、is、are，需随主语变化be动词-人称与数的搭配表主语类型对应的be动词例句I（第一人称单数）amIamamiddleschoolstudent.He/She/It/单数名词/this/thatisSheismysister./Thisisapen.We/You/They/复数名词/these/thoseareWearefriends./Thosearebooks.记忆口诀：I用am，you用are，is连着他她它，单数is复数are肯定句-结构与用法肯定句是最基础的陈述句，用于表达客观事实或状态基本结构：主语+be动词+表语例1：MynameisLily.（表语为名词，说明身份）例2：Theclassroomisclean.（表语为形容词，说明特征）例3：Theyareinthepark.（表语为介词短语，说明位置）注意：主语为单数时be动词用is，复数用are，I用am肯定句-缩写形式详解完整形式缩写形式例句IamI'mI'mfromBeijing.HeisHe'sHe'sadoctor.SheisShe'sShe'sverykind.ItisIt'sIt'sasunnyday.WeareWe'reWe'reinClass2.YouareYou'reYou'reagoodstudent.TheyareThey'reThey'remyclassmates.缩写规则：主语和be动词之间加撇号，省略be动词中的部分字母否定句-结构与用法否定句用于否定事实或状态，在be动词后加not即可基本结构：主语+be动词+not+表语例1：Iamnotlate.（否定“我迟到”这一状态）例2：Heisnotateacher.（否定“他是老师”这一身份）例3：Theyarenotintheclassroom.（否定“他们在教室”这一位置）否定句可分为完整形式和缩写形式，日常交流中缩写更常用否定句-缩写形式对照表完整形式缩写形式适用主语类型amnotI'mnotI（无其他缩写形式）isnotisn'tHe/She/It/单数名词等arenotaren'tWe/You/They/复数名词等例：Sheisnothappy.=Sheisn'thappy.例：Wearenotbusy.=Wearen'tbusy.注意：amnot的缩写只有I'mnot，无其他形式肯定句与否定句-转换练习1.Iamastudent.→____________________2.HeisfromtheUK.→____________________3.Theyareinthepark.→____________________4.Thisisaninterestingbook.→____________________5.Wearehappy.→____________________Iamnotastudent./I'mnotastudent.HeisnotfromtheUK./Heisn'tfromtheUK.Theyarenotinthepark./Theyaren'tinthepark.Thisisnotaninterestingbook./Thisisn'taninterestingbook.Wearenothappy./Wearen'thappy.一般疑问句-核心概念一般疑问句用于询问“是”或“否”，需用Yes或No回答基本结构：Be动词+主语+表语+？构成规则：将肯定句中的be动词提到主语前，句末加问号例：肯定句：Heisastudent.→一般疑问句：Isheastudent?例：肯定句：TheyareinClass1.→一般疑问句：AretheyinClass1?回答需遵循“前后一致”原则，肯定用Yes，否定用No一般疑问句-问答对应表一般疑问句结构肯定回答否定回答AmI...?Yes,Iam.No,I'mnot.Ishe/she/it/单数名词...?Yes,he/she/itis.No,he/she/itisn't.Arewe/you/they/复数名词...?Yes,we/you/theyare.No,we/you/theyaren't.注意：回答时主语需用相应的人称代词，避免重复原主语例：IsLilyyourfriend?→Yes,sheis.（不用Yes,Lilyis.）一般疑问句-特殊指代技巧疑问句（主语为指示代词）肯定回答否定回答Isthis/that...?Yes,itis.No,itisn't.Arethese/those...?Yes,theyare.No,theyaren't.例1：Isthisapen?→Yes,itis./No,itisn't.例2：Arethoseyourbooks?→Yes,theyare./No,theyaren't.替代规则：单数指示代词用it，复数指示代词用they当主语是this/that/these/those时，回答需用it/they替代一般疑问句-标点与语调书写时，句末必须加问号（？），不可用句号朗读时，语调需上扬，体现疑问语气例：AreyoufromShanghai?（语调上扬）若疑问句由this/that/these/those引导，指代具体事物时，语调同样上扬注意：回答时语调需平缓，肯定回答和否定回答语调一致一般疑问句-转换练习1.Iamfine.→疑问句：____________________肯定回答：________________否定回答：________________2.Sheisateacher.→疑问句：____________________肯定回答：________________否定回答：________________3.Theyareintheclassroom.→疑问句：____________________肯定回答：________________否定回答：________________Areyoufine?Yes,Iam.No,I'mnot.Issheateacher?Yes,sheis.No,sheisn't.Aretheyintheclassroom?Yes,theyare.No,theyaren't.语法易错点提醒（一）1.be动词搭配错误：混淆不同主语对应的be动词，如Heare...（错误）2.否定句缩写错误：将isnot缩写为isnot't（正确为isn't）3.一般疑问句语序错误：主语放在be动词前，如Heisastudent?（错误）4.回答时主语重复：IsTomhere?→Yes,Tomis.（正确为Yes,heis.）牢记搭配规则和转换逻辑，避免基础错误语法易错点提醒（二）1.this/that回答未替代：Isthisyourbag?→Yes,thisis.（正确为Yes,itis.）2.amnot缩写错误：Iamnotastudent.→Iamn't...（正确为I'mnot...）3.表语词性混淆：误将副词作表语，如Theyarequickly.（正确为Theyarequick.）4.复数主语用is：Thebooksisnew.（正确为Thebooksarenew.）基础练习（一）-be动词填空1.Mybrother___________astudent.2.___________youfromGuangzhou?3.This___________abeautifulflower.4.We___________notinthesameclass.5.I___________veryhappytoday.6.Those___________myfather'sbooks.7.She___________adoctor.8.It___________arainyday.9.They___________goodatplayingfootball.10.Yourname___________Lucy,right?isAreisareamareisisareis基础练习（二）-肯定句改否定句1.Heisagoodswimmer.2.Weareinthepark.3.ThisismyEnglishbook.4.Iamlateforschool.5.Theyarehappytoday.6.SheisfromCanada.7.Itisaboringmovie.8.Thosearemypencils.Heisn'tagoodswimmer.Wearen'tinthepark.Thisisn'tmyEnglishbook.I'mnotlateforschool.Theyaren'thappytoday.Sheisn'tfromCanada.Itisn'taboringmovie.Thosearen'tmypencils.基础练习（三）-肯定句改一般疑问句1.Sheisanurse.疑问句：____________________回答：Yes,___________.2.Weareclassmates.疑问句：____________________回答：No,___________.3.Thisisaredpen.疑问句：____________________回答：Yes,___________.4.Iamamiddleschoolstudent.疑问句：____________________________回答：No,___________.Issheanurse?sheisAreyouclassmates?wearen’titisIsthisaredpen?Areyouamiddleschoolstudent?I’mnot提升练习（一）-单项选择1.—___________youastudent?—Yes,Iam.A.AmB.IsC.Are2.Mymother___________ateacher.Sheworksinaschool.A.amB.isC.are3.—Isthatyourbag?—No,___________isn't.A.itB.thatC.this4.We___________notinthesameclass,butwearegoodfriends.A.amB.isC.areCBAC5.—___________isyoursister?—Sheisfine.A.HowB.WhatC.Where6.Those___________mybooks.Theyareonthedesk.A.amB.isC.are7.—AreyoufromtheUSA?—No,I___________.A.amB.amnotC.isn't8.He___________astudent.Heisadoctor.A.isB.isn'tC.areACBB提升练习（二）-单项选择

9.This___________adog.ItsnameisWangwang.A.amB.isC.are10.—Issheyourmother?—Yes,___________is.A.sheB.heC.it11.I___________fromChina.IliveinBeijing.A.amB.isC.are12.They___________happybecausetheywonthegame.A.amB.isC.areBAAC13.—Aretheseyourpencils?—No,___________aren't.A.itB.theyC.these14.Thebook___________interesting.Ilikeitverymuch.A.amB.isC.are15.—___________isthat?—It'sacat.A.WhatB.HowC.WhereBBA提升练习（三）-句型转换1.Heisastudent.（改为否定句）2.Theyareintheclassroom.（改为一般疑问句并作否定回答）3.Thisismypencil.（改为一般疑问句并作肯定回答）4.IamfromShanghai.（改为否定句）5.Sheishappytoday.（改为一般疑问句并作否定回答）Heisn'tastudent.Aretheyintheclassroom?No,theyaren't.Isthisyourpencil?Yes,itis.I'mnotfromShanghai.Isshehappytoday?No,sheisn't.综合练习（一）-补全对话A:Hello!What'syourname?B:Myname___________Tom.A:___________youfromEngland?B:No,I___________.I'mfromAmerica.A:___________thisyourpen?B:Yes,it___________.A:AreyouinClass3?B:Yes,we___________.It'sagoodclass.isAreamnotIsisare综合练习（二）-补全对话A:Goodmorning!How___________you?B:I___________fine,thankyou.Andyou?A:I'mOK.___________thatgirlyoursister?B:No,she___________.Sheismyclassmate.A:___________hername?B:Hername___________Lily.A:Areyougoodfriends?B:Yes,we___________.areamIsisn’tWhat'sisare综合练习（三）-判断正误，正（T）误（F）MynameisAmy.Iamastudent.I'mfr