Mention and explain types of subordinate clauses. The following are types of subordinate clauses: Adjectival (Relative) Clauses, Noun Clauses, Adverbial Clauses.

Here are the types of subordinate clauses:

• A subordinate clause (or dependent clause) is a clause that cannot stand alone as a complete sentence because it does not express a complete thought. It relies on a main clause to make sense.

1. Noun Clause: A noun clause functions as a noun in a sentence. It can act as a subject, object, or complement. Example: What he said surprised everyone. (Here, "What he said" acts as the subject of the verb "surprised".)

2. Adverbial Clause: An adverbial clause functions as an adverb, modifying a verb, an adjective, or another adverb. It tells us when, where, why, how, to what extent, or under what condition something happened. Example: She smiled when she saw him. (Here, "when she saw him" tells us when she smiled.)

3. Adjectival (Relative) Clause: An adjectival clause, also known as a relative clause, functions as an adjective, modifying a noun or pronoun. It usually begins with a relative pronoun (like who, whom, whose, which, that) or a relative adverb (like where, when, why). Example: The book that I read yesterday was excellent. (Here, "that I read yesterday" modifies the noun "book".)