七年级英语上册Unit3IsthisyourpencilTheSecondPeriodSectionAGrammarFocus_3c课件.ppt

1、Unit 3 Is this your pencil?,The Second Period Section A (Grammar Focus-3c),Warming up,Write down the things in English.,Grammar Focus,3a Complete the questions and answers about each picture.,this,isnt,these,they,that,is,those,arent,3b Read the questions and complete the answers.,it is,hers,it isnt,

2、Its,they are,his,they arent,Theyre,3c Put some things into the teachers box. Then take one thing out of the box and find the owner. You only have two guesses!,Is this your eraser?,No,it isnt.,语法拓展,一、be动词引导的一般疑问句及回答 在第一单元我们已经初步学习了含有be动词的一般疑问句，即“be 动词+主语（指示代词）+其他？”。当主语是指示代词this/that,作省略回答时，要用it代替；当主语是

3、指示代词these/those,作简略回答时，要用they代替。 Is that his pen? Yes,it is. Are these your pencils? No,they arent. 注意：第一人称改为一般疑问句要进行人称转换。 This is my pencil.（改为一般疑问句） 正：Is this your pencil? 误：Is this my pencil?,二、名词性物主代词 在英语中，物主代词是表示所有关系的代词，分为形容词性物主代词（第一单元已学过）和名词性物主代词（本单元所讲）两种。 概念：名词性物主代词也是用来表示所有关系的代词，有人称和数的变化。,语法拓

4、展,2.用法：(1)名词性物主代词在句中可单独使用，后面不能接名词，其作用相当于一个名词，通常在句中作主语、宾语或表语。有时为了避免重复用名词，而用名词性物主代词来代替形容词性物主代词加名词形式。 （2）名词性物主代词作主语时，谓语动词的单复应随所指物品的单复来定。 Those rulers are his.Yours are red. 3.与形容词性物主代词之间的关系： 名词性物主代词=相应的形容词性物主代词+名词 This is my bike.That is yours.(yours=your bike) 如：my red pen我的红色钢笔,Exercise,一、用括号中所给单词的适当

5、形式填空。 1.Is this_ ruler? No,its_(she).Its not_(I). 2.My father and mother are teachers._(them) are very busy(忙的). 3.Are these_(you) pencils? No,they arent.Theyre_(he). 4.The eraser is not_(you).Its_(I). 5.Who is it? Its_(I) brother.,your,hers,mine,They,your,his,yours,mine,my,二、句型转换。 1.Those are my keys.(改为一般疑问句，并作否定回答) _ _ _ keys? _,_ _. 2.Are you Jim?(作肯定回答) Yes,_ _. 3.Is she your English teacher?(作否定回答) No,_ _.,Are those your,No they arent,I am,she isnt,Homework,1.Re