Read these sentences and write another variant of these sentences with the modal verbs (mustn’t, must, can’t, have to, don’t have to, needn’t). You shouldn't change the meaning of these sentences. Don’t forget about full stops.
Example 0. You have to keep the room tidy.
Answer 0. You must keep the room tidy.
1. You have to do your homework.
2. You can’t turn the music too loud.
3. You don’t have to do this task.