1. You must not do that again.You are very naughty. I am sorry
2. Shall I put some petrol in the car?
No, you needn't. I did it this morning.
3. You mustn't not be late tonight. I shall not. I shall be home early.
4. Shall I give you lift? No, you needn't not. I shall go by taxi.
5. You mustn't not forget to pay the bills today. I have already done it.
6. You mustn't not lose the money I gave you. I shall put it in the safe place.
7. You needn't to buy a gift for Daisy`s birthday. Alright, I shall just send a card.
8. Shall we take a picnic with us for Saturday? No, we needn't . We are going to eat at restaurant