Read these sentences and change the structure “don’t have to” into the sentences with the structure “needn’t”. Don't forget about full stops.
Example 0. I don’t have to wake up early on Saturday.
Answer 0. I needn’t wake up early on Sunday.
1. You don't have to work in the evening.
2. The friends don't have to get up early.
3. I don’t have to wash my hair.