Modal Verbs: MUST

MUST / MUST NOT / MUSTN’T (Strong Obligation)

· Necessity (this is from the speaker’s perspective, i.e. internal)

I must go to bed early tonight; I was so tired at work today.

I really must go to the gym I’ve put on a lot of weight recently.

· Positive suggestion

You must go and see that film from Martin Scorsese.

MUST BE (Deduction)

· He must be rich, I see him drive three different Ferraris every week.

MUST HAVE + PAST PARTICIPLE (Past Deduction)

· It must have rained in the night there are puddles everywhere.

· Wow, that Versace jacket must have cost you fortune! It’s beautiful!

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