用am，is或are填空，然后总结其用法。

(1)That's my father and this ________ my mother.

(2)This is my cousin and that ________ my sister.

　　(3)－________she your sister?

　　－Yes, she ________.

　　(4)－And ________ he your brother?

　　－No. He's my friend.

　　(5)－________ Guo Peng your brother?

　　－Yes, he ________.

(6)I ________ his friend. I'm not his brother.

　　(7)－________ you Jack's brother?

　　－No, I'm not. I ________ his cousin.

(8)These ________ my grandparents.

　　(9)－________ this your aunt?

　　－Yes, it ________.

(10)These ________ my parents, those ________ my grandfather and grandmother.

(11)These are my brothers. They ________ Jeff and Jack.

(12)They aren't my sisters. They ________ my friends.

am用于第一人称单数I之后；is用于第三人称单数ge，she，it以及相当于he，she或it；are用于第二人称或所有人称的复数，表达“是”的意思。可用下面的口诀来帮助记忆：“我用am你用are，is用于他她它，复数全都要用are”。

I am…可以缩写成I'm，he is可以缩写成 he's，she is可以缩写成加she's，it is可以缩写成it's，而we are，you are，they are可分别编写成we're，you're，they're。am，is，are的否定形式是在后面加not，如：am not，is not，are not。is not通常缩写为isn't，而are not通常缩写为aren't。如：

(1)I'm Alice, I'm not Mary. She's Mary.

(2)This isn't my brother. He's my cousin.

(3)They're my brothers. They aren't my friends.

【小题1】Jerry  does morning exercise every day.(改一般疑问句）   
______ Jerry _______ morning exercise every day?
【小题2】The    water was too dirty for us to drink.(改为同义词)
The water was ______ dirty _______we couldn’t drink it.
【小题3】1 don’t know David’s e-mail address.
He doesn’t know David’s e-mail address, either.(合并一句话)
__________he _______ I know David’s e-mail address.
【小题4】The author will leave for Xingyi in a month.(对划线线部分提问)
______  _______will the author leave for Xingyi?
【小题5】1 think Allen must be playing basketball with his brother on the playground,
_________  _________？(写出其反意疑问部分）

1.Jerry does morning exercise every day.(改一般疑问句）    

______ Jerry _______ morning exercise every day?

2.The   water was too dirty for us to drink.(改为同义词)

The water was ______ dirty _______we couldn’t drink it.

3.1 don't know David's e-mail address.

He doesn't know David's e-mail address, either.(合并一句话)

__________he _______ I know David's e-mail address.

4.The author will leave for Xingyi in a month.(对划线线部分提问)

______  _______will the author leave for Xingyi?

5.1 think Allen must be playing basketball with his brother on the playground,

【小题1】Jerry does morning exercise every day.(改一般疑问句）
______ Jerry _______ morning exercise every day?
【小题2】The    water was too dirty for us to drink.(改为同义词)
The water was ______ dirty _______we couldn’t drink it.
【小题3】I don’t know David’s e-mail address.
He doesn’t know David’s e-mail address, either.(合并一句话)
__________he _______ I know David’s e-mail address.
【小题4】The author will leave for Xingyi in a month.(对划线线部分提问)
______  _______will the author leave for Xingyi?
【小题5】I think Allen must be playing basketball with his brother on the playground,
_________  _________？(写出其反意疑问部分）