Unit 3
Is this your pencil?
Section A
3a----3c
是以be动词(is, are 等)，情态动词(can等)或助动词(do, does等)开头表示疑问的句子。对一般疑问句的回答通常需要作肯定或否定回答。
一般疑问句：
Grammar Focus
由be动词引起的一般疑问句
一般疑问句通常用yes或no来回答;
作肯定回答时，主语与be动词不能缩写在一起；作否定回答时，be动词常与not缩写在一起，如isn’t。
注意：am和not不能缩写。
This is a pencil.
Is this a pencil
Grammar Focus
Let’s see these sentences:

This is a ruler. (陈述句)

Is this a ruler? (一般疑问句)
Yes, it is. (肯定回答)
No, it is not(=isn’t). (否定回答)
They are books. (陈述句)

Are they books? (一般疑问句)
Yes,they are . (肯定回答)
No, they aren’t. (否定回答)
Grammar Focus
巧变一般疑问句
『秘诀』：
一调二改三问号
一调：即把句中的be（am / is /are )调到主语的前面。
二改：句中的主语若含有I (my /we )等第一人称代词时，需将它们改为you (your /you ）
三问号：句末的句号改为问号。
一 般 疑 问 句之be动词篇
一调：即把句中的be动词
（am , is ,are)调到句首
This is his book.
Is this his book?
二改：改换代词的称谓
This is my pencil .
Is this your pencil?
三问号：将句末的句号改为问号
1.这是他的书吗？是的，它是
2.那是你的铅笔吗？不，不是。它是她的。
3.这些是他的钢笔吗？不，不是。他们是我的。
4.那些是他的橡皮吗？是的，它们是。
Translate
课堂练习
填 空
1.-Is that your pencil?
-Yes, ____ ____ .
2.-Is this your ruler?
-___ , it isn’t.
3.-____those your books?
-No, they ____.
4.-Is this her pen?
-No, it isn’t. ____ mine.
5.-__ that your pencil box?
-___ , it isn’t. It is ____ .
6.-Is this his eraser?
-___ , it is.
7.- __ this your eraser?
-Yes, ___ ___. It’s___ .
it is
No
Are
aren’t
It’s
No
his/hers
Yes
Is
it is
mine
Is
Exercises:
1、Is this your pen?
A、Yes ,this is. B、Yes, this’s.
C、No ,this isn’t. D、No,it isn’t.
2、Is that a ruler? It’s a sharpener.
A、Yes ,that is. B、No,it is.
C、No,that isn’t. D、No,it isn’t.
3、What’s this?
A、Yes,it is. B、No,it isn’t.
C、It’s a eraser. D、It’s an eraser.
4、What’s name? name is Ma Ling.
A、your ; My B、your ; my
C、your ; I D、you ; my
D
D
D
A
一、Choose the Correct answer(单项选择).
二、Complete these sentences with “am”, “is”, “are”.
1、 this his book?
Yes ,it .
2、What that?
It a book .
3 、How you?
I fine, thank you .
三、Make up sentences.（用所给单词和标点组成句子）
1、your, is ,book ,this, (?)
2、pen, that, his ,is ,(.)
Is
is
is
is
are
am
Is this your book?
That is his pen .
物主代词
Its 与 it’s的区别
Its:形容词性物主代词，“它的”，后接名词。如：I have a dog .Its name is Coco.
It’s=it is ：主语+谓语，“它是”。如：
It’s a pencil.
形容词形物主代词与名词性物主代词的区别：（例句）
1.This book is mine.
2 .This is my book.
3.This is his pen.
4.This pen is his.
5.That is her ruler.
6.That ruler is hers.
这是我的手表。
这块手表是我的。
This is my watch.
This watch is mine.
这些是我的手表。
这些手表是我的。
These are my watches.
These watches are mine.
这是你的狗。
这只狗是你的。
This is your dog.
This dog is yours.
这些是你的狗。
这些狗是你的。
These are your dogs.
These dogs are yours.
一．填空
1.Rabbit hears with________ears.(it)
2.I’ve got a cat,________is very cute.(it)
3.This is _______( 我的 ) book.
4._______( 他的 ) chair is blue.
5._______( 我们的 ) classroom is big.
6._______( 他 ) often plays basketball after school.
7._______( 他的 ) teacher is good.
8._______( 我们 ) buy a pair of shoes for _______( 他 ).
9.Please pass_____( 我们 ) the ball.

11.This is _____(he) bag.It’s______.
12.This is _____(her) bag.It’s______.
13.His bag is green,________is pink.(my)
14.Her eyes are big, but _______are small.(you)
her
it
my
His
Our
He
His
We
him
us
his
his
its
hers
Mine
yours
二.用括号中的适当形式填空
（1）Are these ________（you）pencils?　　Yes, they are ________（our）.（2）—Whose is this pencil?　　 —It’s ________（I）.
（3）I love ________（they）very much.（4）She is________（I）classmate.（5）Miss Li often looks after________（she） brother.（6）—Are these ________（they）bags ？　 —No, they aren’t ________（their）. 
They are ________（we）.
your
ours
mine
them
my
her
their
theirs
ours
3a Complete the questions and answers
about each picture.
this
isn’t
these
they
that
is
those
aren’t
3b Read the questions and complete the
answers.
Is this her ruler?

Is that Eric’s schoolbag?

Are these his pencils?

Are those Anna’s books?
Yes, ___________. It’s _________.
No, ___________. ________ Sally’s.
Yes, ___________. They’re_________.
No, ___________. ____________ mine.
it is
hers
it isn’t
It’s
they are
his
they aren’t
They’re