A1 high_frequency_chunk

Must

UK /["/məst//mʌst/","/ˈmʌsnt/"]/ US /["/məst//mʌst/","/ˈmʌsnt/"]/ Pronunciation

Definition

used to say that something is necessary or very important (sometimes involving a rule or a law)

Listen to definition

In simple words: Something that is necessary or very important.

Examples

• You must finish your homework before playing outside.
• To pass the exam, you must study every day.
• You must wear a helmet while riding your bike.
• We must help those in need during the holidays.
• If you want to succeed, you must work hard.

Usage notes

Use 'must' when giving strong advice or making strong recommendations. Avoid using it in casual conversations where 'should' might be more appropriate.

Grammar pattern

must + verb

Memory hint

Think of 'must' as 'most important' — something you can't skip!

Collocations

• must see
• must do
• must have
• must remember

Synonyms

• have to
• need to
• should
• ought to

Antonyms

• can
• may
• might

Common mistakes

• Using 'must' in situations where 'have to' is more suitable.
• Confusing 'must' with 'might' or 'may', which imply possibility instead of necessity.
• Using 'must' with the gerund form instead of the base form of the verb.