

Noun Clauses

A noun clause functions like a noun in a sentence. Noun clauses are introduced by subordinating words such as what, that, when, why, how, whatever, who, whom, whoever, whomever. (A clause is a noun clause if you can replace the whole clause with the pronoun something or someone.)
  Examples He wants to know what he should do.
[noun clause = something: what he should do]

Whoever scores a goal will be a hero.
[noun clause = someone: Whoever scores a goal]
See also
Independent Clauses
Connecting Independent Clauses
Dependent Clause
Connecting Dependent and Independent Clauses
Adverb Clauses
Adjective Clauses
Sentence Problems: Sentence Fragments