Linked Questions

0 votes
0 answers
29 views

What's the mistake in "When I was a child, I must eat everything on my plate or I wouldn’t get any dessert."? [duplicate]

"When I was a child, I must eat everything on my plate or I wouldn’t get any dessert." Find a part of the sentence that contains a mistake.
1 vote
0 answers
27 views

Problem understanding " must" [duplicate]

From the book : English Grammar and Exercises by L. R. H. Chapman, book 4: "must is a defective verb, with only this one part, which is used to speak about the present time or a near future, as in ...
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0 votes
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"Must had been like" correct grammar in the past continous? [duplicate]

Scenario: Person1: Two people were kissing in the elevator. I was staring at them for a minute until the lady yelled at me. Person2: The lady must had been thinking like "What a weirdo" In ...
56 votes
5 answers
13k views

Why can't the word "can" be used in future tense (will can)?

I'm curious about why the English word can cannot be used in future tense (e.g. will can). An example unrelated to English is French term je pourrai, but that's exactly what I mean. Compare German ...
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6 votes
5 answers
19k views

Are modal verbs finite or non-finite?

According to Oxford Dictionaries Online, finite ... 2 Grammar (of a verb form) having a specific tense, number, and person. non-finite ... Grammar (of a verb form) not limited by tense, person, or ...
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3 votes
3 answers
35k views

Usage of "must have" in past tenses

So, I've checked Is "must" ever grammatical as a past tense verb? and Past tense of "must" when meaning logical probability and I'm also almost confident that I cannot say "must ...
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2 votes
2 answers
13k 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 ...
5 votes
2 answers
965 views

Deontic “must”, “have to” and “had to”

In English, to express strong obligation we can use either must or have (got) to. Grammars remind us that must is often used to express internal (personal) obligation, deduction (likelihood), and ...
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1 vote
1 answer
3k 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 ...
2 votes
1 answer
2k views

Use of 'must have' for obligation in the future

I have noticed there is a way of using 'must have' to denote finished obligation in the future - somewhat akin to the 'future perfect tense'. An example of what I mean: " I must have finished ...
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1 vote
2 answers
2k views

How to express must be in past tense in an inference

How do I express something like below in correct grammar: If he is 21 this year, he must be 20 last year. The problem is that I want to express that his being 20 is in the past tense. It doesn't ...
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1 vote
1 answer
3k 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 ...
4 votes
1 answer
292 views

What is the past form of the modal verb "must"?

There are 9 modal verbs, and you can pair every two of them together to represent present and past forms, except must: can ----› could shall --› should will ---› would may ----› might must ---› ??...
0 votes
1 answer
866 views

Using "must have" in the past [duplicate]

I know the must have/must had thing has been asked before but I have yet to see it in the context of this question. Does "have" make grammatical sense in the following? It sounds like it conflicts ...
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0 votes
0 answers
54 views

The backshift of the forms of infinitives with modal verbs

Must can be used in reported speech. I told him that he must stay home. However, what happens if we use other forms of the infinitive? What is Jack doing? He must be watching TV. 2)I said that ...
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