Put these sentences into the negative, the question and the past.

1. I have to wear a uniform.
2.She has to work hard.
3.He can do what he likes.
4.We're allowed to wear jeans.

1 I have to wear a uniform. I don't have to wear a uniform. Do I have to wear a uniform? I had to wear a uniform. 2 She has to work hard.She doesn't have to work hard.Does she have to work hard?She had to work hard.3 He can do what he likes.He can't do what he likes.He could do what he liked.Can he do what he like?4 We're allowed to wear jeans.We aren't allowed to wear jeans. Are we allowed to wear jeans?We were allowed to wear jeans.