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. Exercise on Modal Verbs and their Substitutes You (must) get up early tomorrow. 'you have to do something' means it is necessary to do it or that you are obliged to do it. Modal perfect: would have means an action that you. Please have a look there and if anything is still not clear after that, you are welcome to ask us again. The past form of will is would: I will help you (present) He said he would help me. 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. For example, 'I must do my homework' means I need to do my homework, but it doesn't mean that I did it. We choose the verb depending on how sure we are. 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. Click here for all the exercises about modal verbs We can use these modal verbs (also called modals of deduction, speculation or certainty) when we want to make a guess about something. 'You must wear a mask on the bus') or that it is necessary not to do something ('mustn't', e.g.
Use the 'Hint' button to get a free letter if an answer is giving you trouble. 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. Fill in all the gaps, then press 'Check' to check your answers.