Relative pronouns

1. Whose:

1.1. replaces pocessive adjective

1.2. e.g. The man who lives here is an engineer. The girl about whom you are talking is my roommate. The bride needs to decide which dress to wear. 

1.3. e.g. Whose football is this?

2. Whom:

2.1. People

2.2. Object of verb

2.3. e.g. I saw the teacher. This is the teacher whom I saw.

2.4. e.g. From whom did you get this ball.

3. Use:

3.1. Connects a group of words to another idea in the same sentence.

4. Two Jobs:

4.1. Replaces noun

4.2. Conjuction

4.3. e.g. Speak to the teacher. The teacher is in the class. Speak to the teacher who is in the class .

4.4. e.g. The man boarded the plane. The plane was flying to Dubai. The man boarded the plane. Which / that was flying to Dubai.

5. Examples:

5.1. Who:

5.1.1. Peoples

5.2. Which:

5.2.1. Things

5.2.2. Animals

5.3. That:

5.3.1. Peoples

5.3.2. Things

5.3.3. Animals