English-- noun clause ( 英文人請進)

A noun clause is a subordinate clause used as a noun. It may serve as a subject, direct object, predicate noun, or object of a preposition.
Examples::::
*Whoever rides in a car* should wear seat belts. (subject)
Claude said *that he is watching television*. (direct object)
Listening to tapes is *how I learned Spanish*. (predicate noun)
Please listen to *what the director says*. (object of a preposition)

words that introduce noun clause::::
how, however, that, what, whatever, when, where, which, whichever, who, whom, whoever, whomever, whose, why