SUBJECT 1. THE MEANING OF SUBJECT In English grammar , a subject is one of the two main parts of a sentence. (The other main part is the predicate . The subject is sometimes called the naming part of a sentence or clause . The subject usually appears before the predicate to show (a) what the sentence is about, or (b) who or what performs the action. As show below, the subject is commonly a noun , pronoun , or noun phrase . 2. TYPES OF SUBJECTS A. The subject may be just a single word: a noun or a pronoun. In this first example, the proper noun Felix is the subject of the sentence: - ...