The relation in which a noun stands to some other words, is called case.

There are three kinds of case.

1. Nominative or Subjective case
2. Objective case
3. Possessive case

When a noun or pronoun is used as the subject of a verb, the case is called subjective case.

Example:
1. Anwar threw a stone.
2. They took meals.

When a noun or pronoun is used as the object of a verb, the case is called objective case.

Example:
1. Anwar threw a stone.
2. Rajeev likes to watch it.

When a noun or pronoun shows ownership of a thing, the case is called possessive case.

Example:
1. It is his car.
2. Tahir will help me.
3. The leg of a table.