Must / Mustn't exercises

“Must” is a modal verb, so we don’t add “to” after it. It has the same form with all pronouns (I must, you must, he/she/it must, we must, they must) and doesn’t require an auxiliary verb to make negations and questions. “I must” means I need to do something. “I mustn’t” means I am not allowed, it is unacceptable, wrong to do it. The exercises on this page will help you practise “must” and “mustn’t” in simple sentences. Recommended for beginners. Check out the related topics below for more basic modal verbs, explanation and exercises.