'must' would be particularly common in writing, especially in British English, and 'have to' works as well and has the same meaning. So in the (B) sentences, both 'must' and 'have to' are possible. For example, if we are speaking about a new film and I tell you 'You must see it', this doesn't mean you are obliged to see it - it's a way that I can express my opinion - in this case in the form of a strong recommendation. 'you must do something' has a similar meaning, but it used more often in written rules and instructions (particularly in British English - this use is less frequent in American English) and is also used to express your opinion about an action. 'you have to do something' means it is necessary to do it or that you are obliged to do it. Please have a look there and if anything is still not clear after that, you are welcome to ask us again. I believe that all of your questions about the (A) sentences are answered on the Permission and Suggestions and obligations pages in this section. But 'My father makes me do my homework' clearly shows that I do my homework. Im not sure where I will go for my holidays, but I go to Italy. For example, 'I must do my homework' means I need to do my homework, but it doesn't mean that I did it. These special verbs are used to communicate suggestions, offers, ability, possibility, certainty, advice, necessity, invitations and permission. Notice that it's not clear whether we actually do the action that is considered necessary (or not necessary) - the rule is that we wear a mask on the bus, but maybe we don't actually do that.Ī sentence with causative 'make' is similar in that it expresses obligation, but it also shows that the action was performed. Below is a list of fun activities for your ESL students to practice Modal Auxiliary Verbs. 'You must wear a mask on the bus') or that it is necessary not to do something ('mustn't', e.g. This may include can, could, may, might, must, will, would, shall, should, and ought to but, depending on the level of your class, you can narrow it down to those you feel are most important. You can read a bit more about 'must' and 'mustn't' in the Obligations section of our Suggestions and obligations page, but basically they express the idea that it is necessary to do something ('must', e.g. Start by introducing all the modal verbs you wish to talk about.