Case tells whether a pronoun shows possession or acts as subject or object in the sentence. Writers use the following three terms:

1. Possessive case means the pronoun shows ownership. Possessive case pronouns do not use an apostrophe.
Example: The goldfish was ours, but Hal gave it to his cat.

2. Subjective case means the pronoun is a subject.
Example: She gave her goldfish to the boy next door.

 

3. Objective case means the pronoun is an object.
Examples: Rebecca sent flowers to her. (Object of Preposition)
Suzy phoned him tonight. (Object of Verb)

When you aren’t sure which pronoun case to use, consult these rules:

1. After a comparison using as or than, add a verb to the end of the sentence. You may write or only think the verb.
        Example: My brother is more agile than I me (am).
2. If a pronoun is in a compound situation, isolate the pronoun in question and use only it with the rest of the sentence.
     Examples: Rod and (me I) ate three pizzas.
Mother gave her crystal to Bob and (me, I).
3. If a subject is followed directly by description equal to the subject, ignore the description.
        Example: Several of (we, us) girls are going to Cancun for our holidays in March.