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1
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1answer
45 views

“…mustn't have done..”: can it mean reproach for a past action or prohibition of a future action?

Can "You mustn't have done that" have a similar meaning to "You shouldn't have done that" / "You were not supposed to do it (but you did)"? (not logical probability but obligation) Since we have the ...
0
votes
1answer
416 views

Must (Past Obligation Interrogative) “Must you have eaten all the food?” [closed]

Is the question "Must you have eaten all the food" correct when used in the past obligatory sense? The best examples I can find are quite ambiguous. "Must He have been less than perfectly kind to ...
1
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2answers
15k views

What is the difference between “have to”, “must”, and “should”? [duplicate]

Is there any difference between have to”, “must”, and “should”? If there is some difference between them, when do I have to use (nor not use) each of the constructions below? have to do something ...
-5
votes
1answer
490 views

“To have to” vs. “should” [closed]

I wonder which one to choose here: My father should drive carefully when it’s raining. My father has to drive carefully when it’s raining.
22
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5answers
5k views

Why should I use “ought to”?

Is "ought to" still used in modern English? If yes, in what contexts is it used, and is it used more in formal or informal cases?
1
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2answers
2k views

“I have to” vs. “I must”

When would you use the following? I have to go the market. I must go to the market. I need to go to the market. If I replace 'have' with 'had' would you have any other way to say it? E.g. I had to ...
1
vote
1answer
322 views

What is the degree of strength of the verbs listed below dealing with rules/advice?

I used to have a list that showed the increasing strength of these words, but I seemed to have lost it. The words/phrases are: must/mustn't, should/shouldn't, have to/don't have to, can/can't, and ...
3
votes
1answer
813 views

“Should” vs “have to”

Consider: You should do it. You have to do it. Does should show suggestion and have to show compulsion or motivation? Correct me if I'm wrong.
4
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4answers
10k views

Does 'should' imply an unquestionable command?

My question is prompted by a question on the programmers.stackexchange: This may be a duplicate of another question here on english.stackechange, but the answers given to that question did not ...