We must check bad tendencies.

（我们）要煞住歪风邪气。

《新英汉大辞典》

Guests must check out before noon, or they will be charged for the day.

旅客必须于中午前办清手续离开， 否则将收取全日费用。

《新英汉大辞典》

I must check the exact time.

我要看看确切的时间。

youdao

They'll say, "Oh, he must think it's not-- He'll--He's going to check under the bed.

他们会说,"他正要去检查床下面"

耶鲁公开课 - 心理学导论课程节选

If you plan to sail with a skipper, "you must check their credentials, " she stressed.

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Admittedly, though, not everyone can do this, and must check their luggage.

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He must check all the miners' vital signs and do daily tests as well as keeping a close watch on the men's weight.

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