Citation:
A noun clause is a dependent clause that functions as a noun within a sentence, acting as a subject, object, or complement. These clauses often begin with subordinating conjunctions like 'that', 'what', 'who', or 'whether', and they provide essential information in sentences without standing alone. By understanding noun clauses, one can better grasp the structure and flow of complex sentences, particularly in distinguishing between independent and dependent clauses, as well as in reducing and expanding clauses.