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3. As the past tense of "must" is also "must" (identical in form) the modal must is normally used only in present tense to avoid ambiguity. When you need the past tense you have to use forms of substitution verbs. "must2" (the past tense form) can be used only in very limited cases. It may occur sometimes in written language in subordinate clauses.
- Use past tense or past perfect? - English Language Learners Stack Exchange
Now I'm confused. Your example switches from past tense to...
- modal verbs - can we use must in past tense? - English ...
The word must has two meanings as a modal verb: one...
- Use past tense or past perfect? - English Language Learners Stack Exchange
Feb 8, 2016 · When expressing a personal opinion in the past, we mostly use must have, NOT had to: He must have been fit. He had to be fit. It must have been great. It had to be great. The modal verb must has two past tense forms: had to and must have. Which form we use depends on whether we want to express obligation or if we want to say how certain we are ...
Must - English Grammar Today - a reference to written and spoken English grammar and usage - Cambridge Dictionary
Oct 21, 2020 · The word must has two meanings as a modal verb: one indicates necessity, and the other probability. The necessity meaning cannot be used about things in the past: instead, you use the past tense of have to. As an example, if you use reported speech you have to backshift the tense: You can use the probability meaning to talk about about ...
“Must” in the Past Tense. Another common problem is using “Must” in the past tense. “Must” is a present tense verb. For past obligations and deductions, we use “Had to” or “Must have” respectively. For example: I must go to the hospital (present necessity). I had to go to the hospital (past necessity). She must have been ...
Aug 27, 2023 · 1. To make an assumption/guess about the past. Could have and might have can be interchangeable and mean the same thing. To make an assumption about the past, we also use “could have” form. I could have lost the keys in the pub. I think/I suspect (probably) I lost my keys in the pub. I might have lost the keys in the pub.
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MUST in different tenses. Must is only used in the present tense and sometimes to express the future. We use a form of have to for the other tenses. The past tense of Must is Had to: I had to pay my speeding ticket yesterday. She had to give a presentation to her boss. The future tense of Must is Will have to: I will have to leave work early ...