根据汉语完成句子。

1．你准备和谁去。__________ are you ____________ with?

2. 如果牙疼你应该去看牙医.

You should see a ____________ if you have a ______________.

3. 比尔每天花费半个小时做作业。

It takes Bill half an hour _________ _________ his homework every day.

4. 养成一种健康的生活方式是非常困难的。

________ very difficult _______ have a healthy lifestyle.

5. 我们都应为保持生态平衡做贡献。

We should help to ___________ the balance of ___________.

6．—今天什么日子？ —星期一，14号。

—__________ today?  —It’s ___________, the 14^th.

7. 那听起来很有趣。  That __________ ___________.

8. 她说牛奶对我的健康有好处。

She says milk is _________ _________ my health.

9. 你怎样看待你镇的交通？

What do you _________ ________ the transportation in your town?

10. 你能来我家帮助我学英语吗?

Can you _________ _________ to my house to help me with my English?

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.

仔细观察下面方框里的句子，你会发现动词“be”有三种不同形式，分别是“is，am，are”，请找出“be”动词这三种不同形式之前的词，也就是主语(其中he，she是单数第三人称，I是单数第一人称，还有其他人称以后再给大家介绍)，归纳填写到下面的表格里。