1. As the object of a verb; as, He knew _what I did_.
2. As the subject of a verb; as, _What course he pursued_ is
seen now.
3. As the object of a preposition; as, My friend annoyed me by
_what he said_.
4. As a predicate nominative; as, The end of it all is (_that_)
_he receives his choice_.
A clause that has the use or function of an adjective, is called an
=adjective clause=; as, He found the book _which he lost_.
A clause that has the use or function of an adverb, is called an
=adverbial clause=; as, I shall go _where they are_. He will destroy it
_unless we hinder him_.
A sentence that consists of one principal clause, and one or more
subordinate clauses, is called a =complex sentence=; as, I have met the
person of whom you speak.
A sentence that consists of two or more independent clauses, is called a
=compound sentence=; as, James came home, but John remained there.
A compound sentence that is made up of complex sentences, or simple and
complex sentences, is called a =compound-complex sentence=; as, We
entered the building, and a man who was working there, gave us
information about it.