1. The pronouns who and whom are sometimes confusing to students
The pronouns who and whom are sometimes confusing to students. We know that who is used as a subject, and whom is used as an object. Following these steps will help you to decide which form to use.
                     

2. a. Isolate the clause which contains who or whom.
 ex:   The man (who, whom) she thought was perfect jilted her.
a. Isolate the clause which contains who or whom.
    (who, whom) was perfect

3. he was perfect or him was perfect
 b. Substitute the word he for who and him for whom.
he was perfect  or  him was perfect

4.   c. Since he was perfect makes sense, you would use who.

5. 1. (Who, Whom) should I call in case of emergency?
d. Sometimes you will have to rearrange the clause into normal word order as in #1.
ex:   I should call (who, whom)....
    I should call him.....thus, whom is correct in the first sentence.   

6. 2.Who, Whom) left the dirty clothes on the washer?
Let’s Practice
2.Who, Whom) left the dirty clothes on the washer?
3. The man (who, whom) came to repair the T. V. arrived very late.
4. The teacher (who, whom) we admired spoke at our graduation.

7. Each of the boys is speaking to (whoever, whomever) passes the house.
One of the men (who,whom) we met is Joe’s uncle.
A girl (who,whom) Jack and I like spoke to us today.

8. Ask (whoever,whomever) you meet to help you look for Sam.
He is a person (who,whom) is always late
One of the boys (who,whom) we know is very tall.