Have to / don't have to / must / mustn't

When do we use 'mustn't'?

• To indicate that something is not allowed or is forbidden.

• To express a strong recommendation.

• To show possibility or uncertainty.

• To indicate a future obligation.

Give an example of 'must' in a sentence.

• You must wear a seatbelt in the car.

• You should wear a seatbelt in the car.

• You can wear a seatbelt in the car.

• You might wear a seatbelt in the car.

What does 'have to' mean?

• It indicates a necessity or obligation to do something.

• It expresses a desire or wish.

• It refers to a suggestion or recommendation.

• It indicates a possibility or chance.

What does 'has to' mean?

• It indicates a choice or preference.

• It is used to express that someone is required to do something, typically in the third person.

• It refers to a past obligation that is no longer relevant.

• It suggests a possibility or uncertainty.

What does 'doesn't have to' mean?

• It indicates a requirement to do something.

• It expresses that someone is not required to do something, typically in the third person.

• It means that something is mandatory.

• It suggests that someone should do something.

Give an example of 'doesn't have to' in a sentence.

• He doesn't have to wear a uniform to school.

• She has to complete her homework every day.

• They must attend the meeting tomorrow.

• You should always follow the rules.

What does 'mustn't' mean?

• It indicates that something is prohibited or not allowed.

• It suggests a strong recommendation or advice.

• It implies a possibility or uncertainty.

• It denotes an obligation or requirement.

What is the difference between 'have to' and 'must'?

• 'Have to' is used for internal obligations, while 'must' is used for external obligations.

• 'Have to' indicates a strong recommendation, while 'must' indicates a suggestion.

• 'Have to' is often used for external obligations, while 'must' is used for internal obligations or strong recommendations.

• There is no difference; they can be used interchangeably.

Give an example of 'don't have to' in a sentence.

• You don't have to bring your own lunch.

• You have to bring your own lunch.

• You should bring your own lunch.

• You must bring your own lunch.

Give an example of 'have to' in a sentence.

• I have to finish my homework before dinner.

• I will finish my homework after dinner.

• I finished my homework yesterday.

• I am finishing my homework now.