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.

There was a little boy who got angry easily. His father gave him a bag of nails(钉子) and told him that every  16  he got angry, to drive a nail into the back wall. The first day the boy had 17  37 nails into the wall. Then he put fewer and fewer nails. He found it was　18   to be not angry than to drive those  19  into the wall. 　Finally the day came when the boy didn't get  20  at all. He told his father about it and the father suggested that the boy now pull out one nail for each day that he was able to be not angry. The days  21  and the young boy was finally able to tell his father that  22  nails were gone. The father took his son by the hand and led him to the  23　. He said, "You have done  24 , my son, but look at the holes in the wall. The wall will  25  be the same. When you say things 　26 , they leave a scar(伤疤) just like this one. You  27  put a knife in a man and draw it out. It won't matter  28  you say I'm sorry, the wound（伤口） is still there. A mental hurt is as bad as a physical one. Friends are a very rare jewel, indeed. They make you  29  and encourage you to succeed. They lend an ear, they share a word of praise, and they always　30　 to open their hearts to us.

1.A. time        B. day         C. week             D. year

2.A. turned      B. driven     C. pulled          D. threw

3.A. harder      B. tougher    C. easier           D. worse

4.A. sticks     B. knives       C. nails            D. forks

5.A. happy          B. sad          C. excited         D. angry

6.A passed          B. came         C. returned         D. happened

7.A. some           B. many         C. all              D. most

8.A. house          B. nails       C. room             D. wall

9.A. badly       B. well       C. sadly            D. kindly

10.A. never       B. sometimes      C. often         D. always

11.A. politely     B. carefully   C. happily        D. angrily

12.A. must          B. need        C. can           D. should

13.A. how much    B. how long     C. how many times   D. how far

14.A. cry           B. jump         C. lose         D. smile

15.A. refuse      B. want           C. fail          D. learn