1、
C——特殊疑问词+to do
1. 我们可以用“疑问词+动词不定式”结构做动词的宾语。疑问词包括疑问代词 what 、which、who和
疑问副词how 、when、where 等。但所有疑问词中，只有why不可以和动词不定式连用。
2. 常和“疑问词+动词不定式”结构连用的动词及短语有：know、learn、see、hear、ask、tell、advise、decide、explain、find out.
另外，“疑问词+动词不定式”结构前，有时也可以是 sure 、clear 等的形容词
翻译：(1)我不知道该做什么。 I don’t know w
2、hat to do.
(2)你怎么知道在那里可以找到我？How did you know where to find me ?
(3)我不确定下面该做什么。I am not sure what to do next.
3.注意：
（1）有些动词，如advise, ask, show, teach, tell等，其后可以接双宾语。
（2）有些疑问词，如what, which, whose, how many, how much等，其后先接一个名词再接动词不定式。
（3）“疑问词+动词不定式”结构在句子中可以做主语和表语。
（4）“疑问词
3、动词不定式”结构可以改写成由该疑问词引导的从句。
练习：
（1）Sandy 问我怎样去那。Sandy asks me how to go there.
（2）他不知道该带多少钱。He doesn’t know how much money to take.
（3）何时开始是一个问题。When to start is a question.
（4）我的问题是在哪里可以找到答案。My question is where to find the answer.
一、单项选择
（ ）1. —I will go to Harbin for my summer va
4、cation. What about you ?
—I haven’t decided where ______.
A. go B. went C. going D. to go
（ ）2. I haven’t decided when _____a holiday yet.
A. took B. taking C. to take D. take
（ ）3.—Can I help you ,dear?
—Yeah, I do not know___
5、 a banana milk shake. Maybe you can help me.
A. what to do B. when to make C. how to make D. why to do
二、句型转换(同义句转换）
1. He showed me how I can start the online tour.
She showed me the online tour.
2. I don’t know what he said.
I don’t know ___
6、 ______ _______.
3. Tom forgot when he met his friends
Tom forgot _____ ______ ______his friends.
4. Sandy is wondering where she asks for help.
Sandy is wondering _______ ________ ________ for help.
5. Amy does not know how she writes the report.
Amy does not know _____ _______ _______ the report
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