Must vs have to grammar
- 1. Must vs Have To / Has To Must and have to express obligation or necessity: The main differences between must and have to are: Must means "really should or else it will be bad for you", it expresses an obligation forced by the speaker. Have / Has to expresses general obligations. When we are talking about another person's obligation we use have to, too. We use have to when the obligation comes from outside. See Modals Chart / Modals Exercises See Subject Exercises: Must vs Have/Has To Exercise 1 Must vs Have To Exercise 2 Mustn't vs Don't Have to Must/Mustn't vs Needn't vs Have to Examples Sentences Teacher : You must listen to me carefully. Father : You must stop smoking. You have to put on uniform at school. She has to buy new dictionary for school. You have to give your report by 5 p.m. tomorrow. They have to wake up early in the morning. MUST Affirmative Form Subject + must + verb + complement You must come home before 8 o'clock. Negative Form Subject + mustn't + verb + complement You mustn't come home before 8 o'clock. Question Form Must + subject + verb + complement ?
- 2. Must you come home before 8 o'clock? Negative Question Form Mustn't + subject + verb + complement ? Mustn't you come home before 8 o'clock? HAVE TO / HAS TO Affirmative Form Subject + has to / have to + verb + complement He has to take his medicine. Negative Form Subject + don't have to / doesn't have to + verb + complement. He doesn't have to take his medicine. Question Form Does / Do + subject + have to + verb + complement ? Does he have to take his medicine? Negative Question Doesn't / Don't + subject + have to + verb + complement ? Doesn't he have to take his medicine? Note: When we say he doesn't have to take his medicine, we mean that he is not obligated to take his medicine. (Lack of necessity) We say he mustn't take his medicine to give it a negative obligation meaning.
- 3. Note: Must is only used in present and future meanings. Have to can be used in any tenses. Note: Must also has a probability meaning. He missed the class for the first time, he must be sick.