Pre - intermediate 7c- HAVE TO, DON'T HAVE TO, MUST, MUSTN'

PRESENTACIÓN

HAVE TO, DON'T HAVE TO MUST, MUSTN'T

HAVE TO - DON'T HAVE TO

Obligation - No Obligation

Have to + verb(infinitive) to talk about rules and obligations Have to expresses a necessity or requirement.

Examples

• Do I have to buy the new book?
• What time does she has to get up to go to school?

• I have to speak English at school
• She has to get up at seven every day

NOT Have I to book I've to go

We use “have to” for general obligations, such as rules at work / school.

HAVE TO - DON'T HAVE TO

Obligation - No Obligation

Don't have to + verb(infinitive) to indicates that something is not necessary. You don't have to go = You can go if you want to, but it's not obligatory / necessary.

Examples

• We don't have to use uniform at this school
• You don't have to go to classes on Saturdays
• Some museums are for free you don't have to pay for them

MUST - MUSTN'T

Strong Obligation - Prohibition

Must + verb(infinitive without to) to talk about rules and obligations Must is used to express a strong obligation or something very important

Examples

• Must I go to bed now?
• When must we decide about the party?

• You must go to bed after brush your teeth
• You must tidy your room before you go out

We use “Must” for a personal obligation.e.g a parent to a child

MUST - MUSTN'T

Strong Obligation - Prohibition

Mustn't + verb(infinitive without to) expresses sth is prohibited. You mustn't go = I'ts prohibited. Don't go

Examples

• You mustn’t touch the wet paint, it’s still drying.
• At the construction site, you mustn’t enter without a helmet.

• Visitors must not park in the staff car park.

we normally use mustn't for apersonal obligation ( one that speaker imposes)

• I mustn't forget to call her