[Noun Clauses] Noun clauses that begin with a question word

 What she said surprised me.

What they should do is obvious.

Who she is is a secret.

 

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What happended?	An information question
Who came to the party?

I don't know what happened.	A noun clause
I don't know who came to the party.

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A: Where did Natasha go yesterday?

B: I don't know. Do you know where Natasha went yesterday?

A: How much does a new Honda cost?

B: Peter can tell you how much one(a new Honda cost).

A: When was the first wheel invented?

B:I don't know. Do you know when the first whell was invented?

A: Who did Julie talk to?

B: I don't know who Julie talked to.

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A: Mom, why are some people cruel to other people?

B: Honey, I don't really understand why some people are cruel to others. It's difficult to explain.

A: I don't care about the future. All I care about is today.

B: Oh? Well, answer this question for me. Where will you spend the rest of your life?