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Unit 3 Is this your pencil单元语法聚焦三一、名词性物主代词mine, yours, hers, his等是名词性物主代词,相当于“形容词性物主代词my/your/her/his名词”。1在英语中,物主代词有形容词性物主代词和名词性物主代词两种。见下表:类别形容词性物主代词名词性物主代词单数形式mymineyouryourshishisherhersitsits复数形式ouroursyouryourstheirtheirs2.名词性物主代词的用法:(1)名词性物主代词形容词性物主代词名词(2)名词性物主代词在句中作主语、宾语或表语。His pen is green.Mine is blue.(作主语)他的钢笔是绿色的,我的(钢笔)是蓝色的。My eraser is in the pencil box.What about yours?(作宾语)我的橡皮在铅笔盒里,你的呢?This is my ruler.That one is hers.(作表语)这是我的直尺,那把是她的。口诀 物主代词分形、名,形式、用法各不同;形容词性先出场,我的my你的your;男的his女的her,它的its不加撇;我们的our他们的their,别忘记!物主代词形变名,多数词尾加“s”;my变mine须分明,his和its是本身;形跟名词,名不跟,用法牢记不会错!二、含有be动词的一般疑问句1定义:用来询问某事物或情况是否属实,需要对方作出肯定或否定回答,即能够用Yes或No来回答的疑问句叫作一般疑问句。2结构:Be(Am/Is/Are)主语其他?3回答:肯定回答:Yes, 主语be(am/is/are). 否定回答:No, 主语be(am/is/are)not.4注意:(1)当一般疑问句的主语不是人称代词时,回答时用相对应的人称代词来替换该主语。Is Lucy your sister? 露西是你的姐姐吗?No, she isnt.不,她不是。(2)在对一般疑问句作肯定回答时,主语不能与be动词缩写为一个词。Is Linda a girl? 琳达是一个女孩吗?Yes, she is.是的,她是。(3)对this, that提问时,无论指人还是物,其回答一律用it。Is this a pencil? 这是一支铅笔吗?Yes, it is.是的,它是。Is that your sister? 那是你的姐姐吗?No, it isnt.不,不是。(4)对these, those提问时,其回答用they。Are those his books? 那些是他的书吗?Yes, they are.是的,它们是。.用括号内所给单词的适当形式填空1That pen is purple. It is not _ pen. _ is orange.(I)2Is this _ (you) watch? No.Its not _ (I)Its _ (he)3These maps are _ (she)4_ pen is not here. _ is at home(在家)(he)5Are these _ (she) books?No, they arent. .按要求完成下列各题,每空一词1This is her ruler.(改为一般疑问句)_ _ her ruler?2Is that your book?(作否定回答)No, _ _3Is this your mother?(作肯定回答)Yes, _ _4Are these your pencils?(作肯定回答)Yes, _ _5Are those his maps?(改为陈述句) _ _ his maps.详解详析单元语法聚焦三语法精练.1.my; Mine2.your; mine; his3.hers4His; His5.her .1.Is this2.it isnt3.it is4.they are5Those are 3
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