A clause is a part of a sentence. Each clause is made up of a subject (who or what the sentence is about) and a predicate (what happens in a sentence). Each predicate has only one main verb. I love you is a sentence which has only one clause. I love you and I will always love you is a sentence which has two clauses. The two clauses are I love you and I will always love you. These clauses are joined together by the word and, which is a conjunction. Clauses may be independent or dependent.