I will probably ..................take a taxi if I want to be in time. must have to not have to. I .............help my mum yesterday. must musted had to. Children at school .............turn off their mobile phones. must have to mustn't. You ..........see him. He is so wonderful! must have to don't have to. She .........learn more. has to must musts. YOu ..........learn more!!! must have to mustn't. My brother ..........be at home at 10 because he is only 15. must have to has to. Does she really ...........leave tomorrow? have to has to must. We ..........speak in the maths classes. The teacher is always very annoyed. must don't have to mustn't. She ............go with us if she doesn't want to. mustn't doesn't have to has to. We .........cook today. Let's go to the restaurant. don't have to mustn't have to. ..................have the homework yesterday? Did you must Had you to Did you have to.