3. Tina is able to speak Chinese.(改為同義句) 

Tina  Chinese.

2. No food in class.(改為同義句)

  in class.

1. We can wear hats in school.(改為—般疑問句并作肯定和否定回答)

5. We can eat in the dining hall. We can't eat in the classroom.(用but連接兩個句子) 

4. We can wear hats in school.(改為否定句)

am,may,must,can t,mustn't

1.— you speak French?

 No,I , but Mr. Black .

2.— I use your knife?

  —Certainly.

3. —we go out and play football now?

  No. you . You finish your homework first.

4. She hear you clearly. Please speak a little louder.

5.—How long I keep this book?

 —You keep it for two weeks.

1.We study English together.(改為同義句)

 English together.

5. The doctor can do nothing to help the boy.(改為同義句) 

The doctor   to help the boy.

4. He has to work for ten hours every day.(就畫線部分提問) 

   he to work every day?

3. She read the book under the tree yesterday afternoon.(改為一般疑問句) 

shethe book under ihc tree yesterday afternoon?