A noun clause is a clause which does the work of a noun in a sentence. It is a group of words containing a subject and a verb of its own. It can be used as a subject, predicate nominative, direct object, appositive, indirect object, or object of the preposition.
Usually noun clauses begin with that, what, where, when, who, whom, which, whose, how, why, whether, etc.
Examples:
· He said that he would not come.
· We were all curious to know what he had done.
· Nobody knows when the registration will begin.
