A noun clause has a subject and a verb within it but can not stand alone; it is a dependent-type of clause. A noun clause replaces a noun phrase and typically starts with who, whom, whose, which, or that. EX: Who built the structure called Stonehenge is not known. "Who built the structure called Stonehenge" is the noun clause, which replaces the usual noun phrase that would be present as the subject in this sentence. For instance, substitute the noun phrase "the builder" for the noun clause above. The builder is not known. Remember: a noun clause can replace any noun phrase, which can appear as part of the subject OR the predicate of a sentence. Hope this helps!! :)

A clause is like a sentence that's within a sentence. A noun clause has the function of a noun in the main sentence. Example: 'I like Jane.' 'I' is the subject- a noun 'like' is the predicate- a verb 'jane' is the object- a noun The entire clause 'I like that she is intelligent' serves the same function as the noun 'Jane' did in the original sentence. She=Jane