Use the substitute form have towhen there is an external obligation e.g. We use "must have", "can't have" and "might have" in the same way as the present perfect - the action we are describing happened, … Use "have to" in the past, present, and future to express responsibility or necessity. "Mustn't" is used to express that something is prohibited. You muststop smoking. It's a Modal Auxiliary Verb, which are very irregular.. One of the strange facts about modal auxiliaries is that they always have at least two kinds of meaning. I must go now. 15. "Must" is also used to give a strong recommendation: You must tell him before it's too late. “We need to …” “We have to…” The modal must also expresses opinion, one person’s point of view. When we use ‘have to’, it is often because someone else has decided the action is necessary. It can point to the past only when it is used with the present perfect tense of the principal verb. We use will have to more than must to express future obligation, especially when talking about obligations at a particular point in the future: He’ll have to wait five weeks for his eye operation. "Must" is a modal verb most commonly used to express certainty. For more details, see our Privacy Policy. In this lesson we look at have to, must and must not, followed by a quiz to check your understanding. I mustgo to New York. Let’s look at one more point on how to use must in English. Spelling it 'must of' is wrong. I was browsing a completely unrelated site and came across the following interesting discussion on the ever increasing proliferation of the phrase, "must of":You mean "must have", btw. You can opt-out at any time. Different meanings of must have different negatives. Accessed 25 Jan. 2021. Synonyms & Antonyms of must-have English as a Second Language (ESL) Expert, How to Use Must, Have to, and Need to in English, To Make it in Journalism, Students Must Develop a Nose for News, How to Speak English for Medical Purposes: Dental Check-up, Past, Present, and Future Are Simple Tenses, 12 Must Have Tools for Studying Live Insects, Learn to Order Events for Narrative Writing Assignments, The 201 Most Commonly Misspelled Words in English, Knowing When You Really Need to Hire an Architect, M.A., Music Performance, Cologne University of Music, B.A., Vocal Performance, Eastman School of Music. Have / Has to expresses general obligations. (note: in this sentence, we would not say ‘I must admit, this food is … In this lesson, you can learn about the modal verbs must, have to and should.Do you know the difference between 'must', 'have to' and 'should'? Find another word for must-have. Must remains unchanged whatever be the tense or the number and person of the subject. 24. Background. This form is used only in the present and future. While must is a modal verb, have to is a semi-modal verb, in the sense that as a modal verb it is used along with the verb to express necessity, but acts like a normal verb in its formulation. Use “must” to indicate requirements The word “must” is the clearest way to convey to your audience that they have to do something. It's like giving advice about the past when you say it to someone else, or regretting what you did or didn't do when you're talking about yourself. Use "must" to express something that you or a person feels is … However, "must" is generally used for strong personal obligations and "have to" is used for responsibilities at work and in everyday life. You mustlog in to read your messages. 2. A must-have object is something that many people want to own: 2. Usually when we use the word ‘must’ it is because the speaker has decided something is necessary to do. The negative form of "have to" expresses the idea that something is not required. Use "have to" in the past, present, and future to express responsibility or necessity. Use the modal mustwhen the obligation comes from the speaker. Listed below are explanations, examples, and uses of must / have to / need to / and mustn't / not have to / don't need to. 1: Should have + past participle can mean something that would have been a good idea, but that you didn't do it. I must say, this food is delicious! I suspect that "must of" is one of those phrases which is on the cusp of changing from "ever so wrong" into something that is perfectly acceptable. My doctor says I have tosto… You must have given my message wrong. Teacher: You must complete this essay by Friday. At times, English speakers use "don't need to" to express that they don't expect someone to do something. They have to resit the test. Must vs. have to Both Must and have to express obligation or necessity, but there are some small differences: • Must expresses the speaker's feelings, whereas have to … In this case we are making a logical deduction based on the evidence we have. Slippery Words Quiz—Changing with the Times. The phrase have to doesn’t look like a modal verb, but it performs the same function. Due to a snow storm the pilot has toland in Vancouver. (sound) The car passengers must have escaped out the back. Must, have to: present: past: When expressing obligation, we say: I must go. 23. They are both followed by the infinitive. OK? Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free! However, you can use must to talk about obligations in formal or written English. timetable, weather or administration. You must not use a calculator during the exam. This prioritization method was developed by Dai Clegg in 1994 for use in Rapid Application Development (RAD). Must "Must" is also used to talk about obligation and is used in written rules and instructions: You must submit your proposal by noon on 12th July. We use the modal verbs "must have", "can't have" and "might have" to make guesses or deductions about an action in the past that we believe has definitely happened, has definitely not happened or possibly happened, based on our knowledge, information or evidence, or lack of it. For example: All passengers must have a valid ticket. Please tell us where you read or heard it (including the quote, if possible). In the example above, the speaker decided it would be a good idea to cut his hair. Good! Learn more. (= They must resit the test) Have to is a more informal while Must is mostly used in written orders or instructions. Often, you need to use a different verb. The bullet of your thought must have overcome its lateral and ricochet motion and fallen into its last and steady course before it reaches the ear of the hearer, else it may plow out again through the side of his head. "Must," "have to," and "need to" in the positive or question form are used to speak about responsibilities, obligations and important actions. Use "need to" to express that something is important for you to do. Learn a new word every day. We had to go to bed at 8 o’clock when we were kids. A CONCLUSION: The car driver must have panicked when he saw the buses moving in on both sides. Take a look: Must Do—Obligations. chiefly US, informal : something that is necessary to have or get. Choose the best option for the following questions. "Must" does not exist in the past. Like with negatives, if you want to use must to talk about the past, the past form depends on the meaning of must. Unlike “must” where we just make an inversion to create the interrogative, “to have to” is a little more difficult as it requires an auxiliary verb in the form of the present tense of “to do”. In the present or future tense, it can sometimes indicate a matter of fact ("what goes up, must come down") and sometimes of obligation ("you must pay your taxes"), or merely exaggerating what is not a necessity by describing it as such ("you simply must see the production of Coriolanus at the Donmar Warehouse if you're in London, it's superb")*. How to use a word that (literally) drives some pe... Do you know these earlier meanings of words? (No other exits were available.) 'All Intensive Purposes' or 'All Intents and Purposes'? 6. Use the modal mustin written orders or instructions. … 'Nip it in the butt' or 'Nip it in the bud'. MUST HAVE; Must expresses an opinion: an inference, a conclusion, based on known details. must-have meaning: 1. or I have to go. Or "must've". "Don't need to" also expresses that a particular action is not necessary. Rules for the Modal Verbs Must and Have To The modal verb must is used to express obligation and necessity. Also, Must expresses obligation imposed by the speaker while Have to expresses external obligation. It can refer to the present or future. One use of modals (like must, should, or may) is called the Deontic sense, and it always deals with social permissions and obligations. 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. NOTE: "have to" is conjugated as a regular verb and therefore requires an auxiliary verb in the question form or negative. "Don't have to" is used to express that something is not required. However, they are used differently depending on who imposes the obligation. Must have expresses an opinion about an earlier (past) situation. I would like to see my sister. IMPORTANT: The past form of "have to" and "must" is "had to." 1. Native English speakers use have to much more in conversation. (Entry 2 of 2). Synonyms: all-important, critical, essential… Antonyms: dispensable, inessential, needless… Find the right word. When we are talking about another person's obligation we use have … 2. 1. It can also be used to express necessity or strong recommendation, although native speakers prefer the more flexible form "have to." Test your knowledge - and maybe learn something along the way. a)should have b)ought to be c)should have been d)ought to have been e)shouldn’t have been f)ought to not have been g)should be h)ought not to have i)ought to j)ought not to have been Must Have / Would Have Referring to past events. The bus passengers must have heard a crunch. Use "must" to express something that you or a person feels is necessary. A daily challenge for crossword fanatics. b)should have c)ought to have - You ----- watching TV all night yesterday, that’s why you feel so tired now. Candidates must arrive no later than five minutes before the scheduled start time. Must and have to are both used for obligation and are often quite similar. You mustn't be late for work on your first day. 1. We use have to / must / should + infinitive to talk about obligation, things that are necessary to do, or to give advice about things that are a good idea to do. "Have to" is used to express certainty, necessity, and obligation. This form is often used for something that is important one time, rather than referring to a responsibility or duty. It is not always correct to substitute have to for mustin the Simple Present. What made you want to look up must-have? Delivered to your inbox! 24 synonyms of must-have from the Merriam-Webster Thesaurus, plus 32 related words, definitions, and antonyms. A must-have object is…. something necessary, indispensable, or unavoidable, Post more words for must-have to Facebook, Share more words for must-have on Twitter, The Difference Between 'Hoard' and 'Horde'. Have to is NOT an auxiliary verb (it uses the verb have as a main verb). Past Forms of Must. When expressing obligation, the past of must and have to is always had to: I had to wash my car yesterday . "Don't have to," "don't need to" and "mustn't" have very different meanings. Using MUST in English We use must to Express a stronger point of view. Sometimes, "must" and "have to" can be used to speak about responsibilities. 'Must' can also be used to show that we are certain something is true. “Must-have.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/must-have. Use the negative form of "need to" to express that something isn't necessary, but possible. Must is not an ordinary English verb. How to Use Must, Have to, and Need to in English Have to Do—Responsibilities. Both must and have to talks about obligation, but must highlight a personal obligation, and have to outlines an external obligation. something considered absolutely necessary or essential to own: This cookbook is a must-have for chocolate lovers. Must is a modal auxiliary verb. The negative form of "must" expresses the idea that something is prohibited—this form is very different in meaning than the negative of "have to"! It is, however, possible if so desired. Must and have to both express obligation. We include have to here for convenience. “Shall” is one of those officious words that … See the full definition for must-have in the English Language Learners Dictionary. Have to can play the role of must in the past (had to) present, and future tenses. Must-have: impossible to do without. 11. : When expressing a personal opinion about probability (deduction), we mostly use must to express that we feel something is true: He must …