must
/məst/
/məst/
/mʌst/
/mʌst/
释义
modal verb（表示命令或需要）必须；（表示确信某事属实）肯定，一定
英英释义
modal verba word that you use to tell somebody what to do or what is necessary
modal verba word that shows that you are sure something is true
场景例句
- You must look before you cross the road.
- You mustn’t be late.
- You don’t have to do your homework today (= you can do it today if you want, but it is not necessary).
- You must be tired after your long journey.
- I can’t find my keys. I must have left them at home.
词态变化
must, musts
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