must have
→
must've
/mʌstəv/
Reduction
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STANDARD FORM → REDUCED FORM
must have →
must've
/mʌstəv/
Used to express a strong deduction or logical conclusion about a past event, meaning 'it was surely the case'.
In fast or casual speech, 'have' following 'must' is often reduced to '-ve', sounding like '/əv/' or even just '/ə/'. This makes the phrase shorter and smoother.
Step 3 · Context
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Example 1
He must've left already, his car isn't here.
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Example 2
They must've been really tired after that long journey.
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Example 3
You must've forgotten your keys again!
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Example 4
Wow, you must've been so busy today!
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Example 5
He must've missed the bus again.
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must have →
must've