WHEN TO USE THE NOMINATIVE CASE (SUBJECT PRONOUNS)
For the subject of a sentence
We students studied until early morning for the final.
Ronnie and I "burned the midnight oil," too.
For pronouns in apposition to the subject
Only two students, Beatrice and I, were asked to report on the meeting.
For the predicate nominative/ subject complement
The employees nominated for the award were she and I.
For the subject of an elliptical clause
Shirley is more experienced than she.
For the subject of a subordinate clause
Valerie is the driver who reported the accident.
For the complement of an infinitive with no expressed subject
I would not want to be he.
WHEN TO USE THE OBJECTIVE CASE (OBJECT PRONOUN)
For the direct object of a sentence
Sarah invited us wallflowers to her party.
For the object of a preposition
The books that were torn belonged to her and her sister.
The duties are divided between the staff director and me.
For the indirect object of a sentence
Calvin gave me and his other girlfriend a dozen red roses.
For the appositive of a direct object
The committee elected two delegates, Doris and me.
For the object of an infinitive
The young boy wanted to help James and me paint the fence.
For the object of a gerund
Enlisting him was surprisingly easy.
For the object of a past participle
Having called the other students and us, the secretary went home for the day.
For a pronoun that precedes an infinitive
The supervisor told him to work late.
For the complement of an infinitive with an expressed subject
The fans thought the best player to be him.
For the object of an elliptical clause
Calvin tackled Eddie harder than me.
For a pronoun in apposition to the object of a verb
Terrace invited two extra people, Minnie and me, to her party.
WHEN TO USE A POSSESSIVE CASE PRONOUN
Before a noun in a sentence
Our friend moved during the semester break.
Before a gerund in a sentence
Her running helps to relieve stress.
We have no record of your having called our office.
We don't mind your taking carts to the parking lot.
As a noun in a sentence
Mine was the last test graded that day.
WHEN TO USE A REFLEXIVE PRONOUN
As a direct object when its antecedent is present in the sentence
I kicked myself.
As an indirect object when its antecedent is present in the sentence
Julian bought himself a tie.
As an object of a preposition when its antecedent is present in the sentence
Monte and Aja baked the pie for themselves.
As a predicate pronoun when its antecedent is present in the sentence
She hasn't been herself lately.
NOTE: Do not use a reflective pronoun to substitute for a personal pronoun.
Incorrect: Send the report to either the manager or myself at your earliest convenience.
Correct: Send the report to either the manager or me at your earliest convenience.
WHEN TO USE WHO AND WHOEVER
As the subject of a dependent clause
He is the person who I think has outstanding leadership skills.
Give the money to whoever wins.
He is a person who is dedicated to his principles.
WHEN TO USE WHOM AND WHOMEVER
As the object of a dependent clause
Voters will elect a person whom they think they can trust.
She is the person for whom I have a great deal of respect.