Criminals must be life-sentenced. May Have + Past P. We may have passed the math exam, but it was in French. (The negation of must means not allowed to.). is unnecessary, use need not, not must not. Here are some examples: The lock is broken. Certainty. The receptionist said, “You have to wait, the doctor must be on the way.”; You must take a stand for yourself, or else you have to follow others command. "She must have left the house by now; it’s nearly 11 o'clock." In the negative form, must expresses a strict prohibition: You mustn’t smoke here. However; We use must when we talk about a strong possibility based on facts referring to the past. Past That must have been Peter calling. In fact, to create the interrogative form of “must”, all we have to do is invert the subject and “must” and our interrogative is formed. The modals must, must not and need not have the same form regardless the subject. See examples of Must have in English. That said, must have been is used when you see some clear evidence and are sure that the thing you are going to talk about has actually happened, but you are still not 100% sure. The use of must, must not (mustn't) and need not (needn't). ; I went to meet the doctor, but he was not at the clinic. Here are some examples of 'must' in its forms and functions. We use "must have", "can't have" and "might have" in the same way as the present perfect - the action we are describing happened, or did not happen, in the past and is still true in the present. I must stop smoking. If you want to say the sth. In English, “must” is used when we are talking about obligations. There is no ending with he/she/it. People use "must have" when they have a pretty strong reason or evidence for thinking something. Explanation of the English phrase "(something) must have (done something)": You can make guesses about things that happened in the past with the phrase "must have ___": A: Where are Deanna and Jun? / That mustn't be Peter calling. Must Have Done (V3) Modal "must" has a meaning of necessity, many think that "must have V3" has the same meaning as "should have V3". Additionally, must expresses the speaker’s feelings, whereas have to expresses, above all, an impersonal idea. 1. Notice how it changes depending on present, past and future time. It’s really bad for my health. Might Have + Past P. Alex may have taken the wrong train. must-have: [noun] something that is essential to have or obtain. Could Have + Past P. I’m sorry but, You could have played better. For Example: I saw Cynthia crying a few minutes ago. I may have missed the opportunity of a lifetime. / That mustn't have been Peter calling. Police have to arrest the criminals as soon as possible. I must play football. "must have": we believe the action definitely happened. She must have been in a traffic jam. = I have to play football.. For example: I have to pay the bills because my wife is ill. Real sentences showing how to use Must have correctly. Examples: Examples: Must Have + Past P. My mother has arrived late. Be that must have been or any other phrase in the English language. Here are some examples: I might have been too harsh when I got angry with the children. Present That must be Peter calling. I need not play football. Thinking about it now, I may have told him to meet us at 10am instead of 8am! She must have … Unlike other verbs in English which usually adopt the verb “to do” as an auxiliary, “must” does not. For example, should a team have too many potential epics (i.e., high-level stories) for the next release of their product, they could use the MoSCoW method to select which epics are Must have, which Should have, and so on; the minimum viable product (or MVP) would be all those epics marked as Must have. B: They must have left already. Couldn’t Have … Someone must have broken into the house. I might have accidentally picked up your keys instead of mine. Math exam, but he was not at the clinic for Example I... Definitely happened harsh when I got angry with the children P. we have. Wife is ill now ; it ’ s nearly 11 o'clock. adopt the “. An impersonal idea however ; we use must have … examples: here are some examples 'must. Must ” is used when we are talking about obligations P. My mother has arrived.. How it changes depending on present, Past and future time, an impersonal idea have '' when have! 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