NOUN CLAUSES

Definition:

A dependent clause that functions as a noun (that is, as a subject , object , or complement ) within a sentence. Also known as a nominal clause.

Two common types of noun clause in English are that-clauses and wh- clauses:

• that-clause: I believe that everything happens for a reason.


• wh -clause: How do I know what I think, until I see what I say?

See also:

• Complement Clause
• Extraposition
• Gerund
• Infinitive
• Noun Phrase
• Putative Should

Examples :

I don't know who he is.

Whoever she is is not important.

Whatever is in the box is a mystery.

Can you tell me what he is doing?

She doesn't undestand why he is leaving.

I wonder how much that costs.

Do you know how long it will take?

http://grammar.about.com/od/mo/g/nounclauseterm.htm

http://www.eslgold.com/grammar/noun_clauses.html