must; have to
Meanings
2 senses · 10 examplesadverb
must; be necessary
Used to emphasize that an action is required based on logic, rules, or common sense, often used in formal and informal contexts.
You must work hard and study diligently to get good grades.
We must follow traffic rules to ensure travel safety.
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To pass the exam, you must carefully review all knowledge points.
In the lab, we must strictly follow the operating procedures to conduct experiments.
Protecting wild animals is a responsibility that everyone must fulfill.
adverb
used to strengthen imperative tone
formalUsed to give firm, direct orders, usually in formal or official scenarios, or when speaking to subordinates/people in a position of authority.
Tomorrow's meeting is very important, you must be present on time.
All contestants must arrive at the venue 15 minutes before the start of the game.
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Everyone must keep quiet and do not disturb other test takers.
During construction, passersby must take the designated detour route.
In this project, team members must strictly follow the orders issued by superiors.