小博士：我们在这几个月的学习里，接触到不少的疑问词，其中疑问代词占大多数。那么疑问代词有哪些？又有哪些用法呢？看看下面的总结吧！

　　1)疑问代词在句中起名词词组的作用，用来构成疑问句。疑问代词有下列几个：

　　指人：who，whom，whose

　　指物：what

　　既可指人又可指物：which

　　2)疑问代词在句中应位于谓语动词之前，没有数的变化，除who之外也没有格的变化。无论是做疑问代词还是限定词，which和what所指的范围都是不同的。what所指的范围是无限的，而which则指在一定的范围内，例如：

　　Which movies do you like best?

　　你喜欢哪几个部电影？

　　What movies do you like best?

　　你喜欢什么样的电影？

你明白了吗？那么就请选用刚才我讨论过的疑问词完成下面句型转换。

1　　My favorite subject is science.

________ ________ your favorite subject?

2　　He likes art best.

________ ________ he like best?

3　　My science teacher is Mr Green.

________ ________ your science teacher?

4　　He's really busy today.

________ ________ really busy today?

5　　Betty's backpack is in her bedroom.

________ backpack is here?

阅读下面一篇短文，用动词的正确形式填空（必要时加上情态动词或助动词）。

When Ale Lincoln was just a boy, he (1)_________ (have) to help his father (2) ________ (look) after his farm. It was hard work and there wasn’t any (3) _________ (interest) thing for him. Abe wanted (4) ________ (go) to school. But there was no school there. Abe was sad most of the time.

Mrs. Lincoln loved the boy very much. She tried his best (5) _________ (make) Abe happy. One early morning she got up early and went to town. That was a very long way and it took her a long time (6) ________ (get) to town, she bought something there and went back. And it was late in the evening when she got home.

The next morning, Mrs. Lincoln said to Abe, “Today (7) ________ (be) your birthday, we (8) ________ (have) a party”. She put some food on the table, then (9) _________ (bring) out a present.

“A book!” Abe cried. It was an old book, but he liked it. A smile (10)_________ (come) to his face. He looked up at Mrs. Lincoln and said, “Thank you, Mum”.

小博士：

A．仔细观察下面方框里的句子，你会发现动词在某些人称后要发生变形，是哪些人称呢？不是我I(第一人称)，也不是你you(第二人称)，而是他he，她she，它it(单数第三人称)，请找出动词遇单数第三人称时的变化规律，归纳填写到下面的表格里。

阅读下面一篇短文，用动词的正确形式填空（必要时加上情态动词或助动词）

A young boy and his pet dog (1) __________ (play) with a ball in the street. He kicked the ball too hard, and it broke the window of a house and (2) _________ (fall) inside. A lady came to the window with the ball and shouted at the boy. So the boy ran away with his dog quickly, but he still wanted (3) _________ (get) his ball back. A few minutes later he returned and (4) ___________ (knock) at the door of the house. When the lady answered it, he said, “My father (5) ___________ (come) and fix your window very soon.”

After a few more minutes, a man came. There (6 ) __________ (be) some tools in his hands. So the lady let the boy (7) _________ (take) his ball away.

When the man finished (8) ___________ (fix) the window, he says to the lady, “That (9) __________ (cost) you ten dollars.”

“But (10) __________ (not be) you the father of that young boy?” the woman asked. “Of course not,” he answers. “Aren’t you his mother?”