My and mine are possessives.
My is a possessive adjective and we use it in front of the noun that it modifies.
Mine is a possessive pronoun and is used instead of a noun.
You could ask the students questions based on the model below:
- This is my cup.
- This is mine. This cup is mine.
- Is this your cup?
- Yes, this is my cup.
- Is this cup yours?
- Yes, this cup is mine.
- Which cup is yours?
- This cup is mine.