How to Use Must in English - English Modal Verbs

This video lesson by Oli from Oxford Online English explores the various meanings and uses of the verb 'must' in English. It covers how 'must' can express obligations, prohibitions, strong advice, and logical necessity. The lesson also discusses the differences in using 'must' in formal and informal contexts, its negatives and opposites, and how to express 'must' in past tense scenarios. The video concludes with a review of the key points discussed.

What does using 'must' to express an obligation imply?

• It is a question.

• It is a necessity or rule.

• It is a personal choice.

• It is a suggestion.

In which context is 'must' typically used to express rules?

• Text messages

• Casual conversations

• Formal or written English

• Informal spoken English

What does 'mustn't' indicate when used in a sentence?

• A prohibition or something forbidden

• A personal obligation

• A logical deduction

• A strong recommendation

Which of the following is true about 'mustn't'?

• It can be used in both formal and informal English.

• It is similar in meaning to 'can'.

• It can only be used in formal English.

• It is used to express a suggestion.

When 'must' is used to give advice, what does it imply?

• A prohibition

• A strong recommendation

• An obligation

• A question

Can 'mustn't' be used to give advice?

• Yes, always

• No, never

• Only in formal settings

• Only in informal settings

What does 'must' express when used for logical deductions?

• A possibility

• A question

• A certainty based on evidence

• A fact

Which of the following is an example of using 'must' for deduction?

• You must try the new restaurant.

• They must be home; the lights are on.

• You mustn't talk during the exam.

• You must finish your homework.

What is the past form of 'must' when used for obligation?

• Had to

• Could have

• Must have

• Should have

What is the negative form of 'must' when used for prohibition?

• Mustn't

• Can't

• Won't

• Shouldn't