Listen and circle what you hear: contracted or full forms. Practise saying the conversations in pairs.
1. A: You (1) mustn't / must not be rude to your parents.
B: Yes, Grandma. But my parents (2) don't / do not listen to me.
2. A: (3) It's / It is 11 o'clock. Have you done your homework yet?
B: Yes, (4) I've / I have.