must - Master This Word
Master this word with our 5-step learning method – Learn English in English
must Word Meanings
- indicates obligation or necessity
- expresses a strong recommendation
- used to state certainty or strong belief
must Example Sentences
Example sentences are the start of understanding. Don't rush to memorize. First feel how the word works in a sentence.
must Phonetic & Pronunciation
UK
/mʌst/
US
/mʌst/
must Word Etymology
must = mo- = must + -st = to have to; Middle English from Old English moste; memory image: think of a strong chain binding you to an obligation.
Note 1: These definitions and etymologies are not standard dictionary definitions, but extended explanations provided to help with memorization and understanding of the actual application of words. Through this background information, we strive to make words more vivid and easier to understand, and help you remember their meanings in real life.
Note 2: LexiTalk designs the learning flow around the linguistics principle of “Comprehensible Input.” When learners encounter material that is slightly above their level but still understandable from context, the brain naturally absorbs the language. That’s why we keep every word inside authentic contexts, using examples and associations to help you understand it and use it flexibly.
Read the FAQ explanation of Comprehensible InputEnglish Brain Route
First I push the door and watch it move. I shift my weight and adjust my grip as it opens wider. The scene changes as light hits my eyes, and I hold steady, keeping my pace. I choose to go on, set my mind, and let the moment guide my steps.
Real Context
Must is a modal verb used to express obligation, necessity, or a strong recommendation depending on context. It indicates that something is required by rules, law, circumstance, or personal decision. It is stronger than should and often more formal than have to. In questions it asks about necessity: Must we leave now? Its negative form is must not, which signals prohibition, while cannot can express impossibility in some contexts. Unlike other modals, must does not change with the subject; it remains must for I, you, he, she, it, we, they. In formal writing or planning, must conveys a clear sense of certainty about a future action or outcome.
Usage Reminders
- distinguish must from should and have to
- use must for laws, rules, or strong commitments
- use must not for prohibitions
- keep must the same across all subjects
- use cannot only for impossibility in some contexts, not always with must
- reserve must for clear future certainty in formal writing
Common Misconceptions
- Must is the same as should in all contexts
- Must can be used for future possibility or probability
- Must past forms exist (musted)
- Must is casual and informal
- Must can replace have to in all situations
Thinking Differences
Native English speakers typically reserve must for strong rules or personal commitments; it carries urgency or formal weight. Learners often overgeneralize it to casual advice or use it in past contexts where a different modal would be correct.
Learning Tips
- Identify if obligation is rule-based or personal commitment
- Compare must with have to and should in real examples
- Remember must not signals prohibition
- Notice that tense does not change must
- Use must in questions to ask about necessity
- Practice common collocations like must do, must not do
5-Step Learning Method - Learn English in English
Step 2: Usage
Which sentence uses 'must' correctly?
A.You must jump to fly.
B.He must eat apples to grow taller.
C.She must be at least 6 feet tall to ride the roller coaster.
D.They must go swimming to bake a cake.
Step 3: Similar Words
Which word is most similar to 'must'?
A.Might
B.Could
C.Should
D.Shall
Step 4: Opposite Words
What is the opposite of 'must'?
A.Optional
B.Strongly
C.Allowed
D.Certain
Step 5: Mastery
Can you give an example of a real-life scenario where a decision 'must' be made?
A.I have to decide whether to go to the gym or not.
B.I must eat breakfast every morning to stay healthy.
C.It is necessary to wear a seatbelt while driving.
D.She must choose between studying abroad or staying home.
Related Listening
🌱 Lite (Beginner)
🔥 Advanced
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