Unit 3 Is this your pencil?Section A（Grammar Focus-3c）课件（16张PPT）

课件13张PPT。Unit 3 Is this your pencil?The Second Period
Section A (Grammar Focus-3c)Warming upWrite down the things in English.Grammar Focus3a Complete the questions and answers about each picture.thisisn'tthesetheythatisthosearen't3b Read the questions and complete the answers.it ishersit isn'tIt'sthey arehisthey aren'tThey're3c Put some things into the teacher's box. Then take
one thing out of the box and find the owner. You only
have two guesses!Is this your eraser?No,it isn't.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 aren't.
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形式填空。
1.—Is this_________ ruler?
—No,it's________(she).It's not________(I).
2.My father and mother are teachers.________(them) are very busy(忙的).
3.—Are these_________(you) pencils?
—No,they aren't.They're_________(he).
4.The eraser is not________(you).It's________(I).
5.—Who is it?
—It's________(I) brother.yourhersmineTheyyourhisyoursminemy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 yourNo they aren'tI amshe isn'tHomework1.Recite Grammar Focus.
2.Find out the English words of school
things you know.Thank you!