yesterday?

如果句中没有be动词、助动词或情态动词，则根据谓语动词的形式借助do的相应形式放在句首。具体方法是：

（1）如果谓语动词是原形，则借do；

（2）如果谓语动词是一般现在时第三人称单数形式，则借does；

（3）如果谓语动词是过去式，则借did.

（4）需要注意的是，借does或did后，原句的谓语动词要变回原形。

总结：一般疑问句的语序（结构）：（情态、助、系be）动词 + 主语+其他谓语部分或表语+......?

三、观察下列17组句子。根据陈述句中的划线部分，填出相应特殊疑问句的疑问词。

1. Li Lei is a doctor．Who is a doctor？

2. This is his book．Whose book is this？

3. The ball is under the bed．Where is the ball？

4. He didn't come because he was ill．Why didn't he come？

5. I'm fine．How are you？

6. He did it in that way．How did he do it？

7. The river is five meters wide．How wide is the river？

8. I have a lot of money．How much money do you have？

He has been to Shanghai three times．How many times has he been to Shanghai？

9. He has stayed here for ten days．How long has he stayed here？

He will be back in two hours．How soon will he be back？

10. I watch TV twice every week．How often do you watch TV every week？

11. I like this one among these three．Which do you like among these three？

12. There is a book on the desk．What is on the desk？

13. My father is a teacher．What is your father？

14. An orange is orange．What color is an orange？

15. Today is Friday．What day is it today？

16. Today is July 1st．What is the date today？