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  • What is the difference between “have to”, “must”, and “should”?
    As epistemic modals, must means 'necessary, in my opinion' (He must be home by now), while should means 'likely, in my opinion' (He should be home by now) Have to still means must epistemically, but it's not as common outside deontic usages –
  • the difference between must have + (past participle) and should have . . .
    'Must have" is, interestingly, the opposite not of 'mustn't have' but of 'can't have' So yes, 'extremely likely' but with a feeling of 'surely it can't have been otherwise' 'should have been' often means 'ought to have been' as in "Caruthers should have been head boy <but Grabber Major got it because his Dad gave money for the new chrcket pavillion> "
  • When should one use should and when should one use must?
    I agree that must and should are clearly distinguishable I've had more trouble when non-native students have asked for a definitive hierarchy of words like must, have to, need to, etc I generally answer that whether I say they must, have to, or need to do their homework, I expect it done –
  • How can I use “must have been”? - English Language Usage Stack . . .
    Be that must have been or any other phrase in the English language 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 Here are some examples: The lock is broken Someone must have broken into the house
  • must have, have to have, or should have: What should I use?
    This is not the case with must have used "to express believing that the action definitely happened" If you look at the examples given at the link you provide, must have is the past modal form of must, so have is not the main verb: She must have left the house by now; it’s nearly 11 o'clock The main verb in this sentence is left, not have
  • Can must have be used to indicate an obligation?
    I have searched an answer for this one and thr closest I could find was that when one means obligation in the past, one should use "had to" rather than "must have", and on the other hand, when a strong conviction or opinion is to be expressed, "must have" should be used, as in "He had to do it because he was charged with it, and "he must have
  • word choice - Must or Should? - Must or Should? - English Language . . .
    You must have made your weekly claim … is a logical conclusion of what actually happened We observe some facts, and conclude that you did make you weekly claim as described - otherwise the observed facts would have been different If you change it to: You should have made your weekly claim … the meaning changes completely
  • grammaticality - must be or must have been - English Language . . .
    'She must have been tired' assumes that the walk took place in the past and the walker was tired at the end of it 'She must be tired' implies that she is tired now It's not impossible to say 'She walked for two hours' when speaking of a walk that has recently finished, though as a British English speaker I would probably say 'She has been walking for two hours'
  • Whats the difference between woulda and wouldve?
    would have, may have, might have, must have, should have, could have would've, may've, might've, must've, should've, could've woulda, maya, mighta, musta, shoulda, coulda wʊdə, meyə, maytə, məstə, ʃʊdə, kʊdə Willa is unusual, because will have is unusual; normally will prefers to contract with a subject (ideally a personal
  • tenses - Using have ran or have run - English Language Usage . . .
    I have always used "have run", but wasn't sure if "have ran" is acceptable in modern English If it helps, the writer is British (I am American), so not sure if this is a place where cultural differences come into play





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