The subject is a noun (or pronoun) which does the action expressed by a verb (if the verb is in the active voice) or has the action done to it (if the verb is in the passive voice).

  1. The subject will be in the nominative case.
  2. The subject either will be a noun, pronoun, or word used as a noun, or will be expressed in the verb ending.
  3. The subject and predicate agree in terms of number (both are in the singular form or both are in the plural form). Note the exception to neuter plural subjects below.
  4. If the subject of a sentence is expressed by a noun, pronoun or noun-like word, the verb will be third person.

In English, the subject must always be expressed (by a noun, pronoun, or something functioning as a noun). In Greek, since person is expressed in the ending of a verb, the subject need not be expressed if the subject is a pronoun. In fact, if the subject is a pronoun, rarely will Greek use more than the verb itself to express both the subject and the predicate.