Definition :
A person or thing that is addressed is said to be the Vocative Case or Nominative of Address.

Function of a Noun

A noun can have one of the following five uses or functions

  • The subject of a verb:
    e.g. David sings well
  • The object of a transitive verb:
    e.g. He bought a pen
  • The complement of an incomplete verb:
    e.g. My brother is a doctor
  • The object of a preposition.
    e.g. He went by this door
  • In opposition to the noun that goes before it.
    e.g. David, my cousin, is a great scholar

Learning Competency

Modal auxiliaries Vs Primary auxiliaries
Primary auxiliaries are be, do, have. They are used to form tenses and to frame short answers.
Modal auxiliaries are will, would, may, might, shall, should, can, could, must, dare, need, used, ought. They are used to express moods.