HAVE TO/ DON´T HAVE TO/ MUST, MUSN´T

you are much stronger than you think you are! trust me

have to, don´t have to, must and mustn´t

go!

HAVE TO / DON´T HAVE TO

IT´S CLOBBLERIN´TIME!

HAVE TO + INFINITIVE VERB = rules and obligations

I have to speak english at work

She has to get up at seven every day

don´t have to + infinitive verbs = to say that there´s no obligation or sth THAT is not necessary

We don´t have to wear a uniform at school.

He doesn´t have to work on saturdays

DO / DOES FOR -- AND QUESTIONS

Do I have to buy a dictionary? what time does she have to get up tomorrow?

MUST / MUSTN´T

WE USE MUST + INFINITIVE VERB (WITHOUT TO) TO TALK ABOUT RULES AND OBLIGATIONS. You must do your homework tonight. mUST AND MUSTN´T ARE THE SAME FOR ALL PERSONS. She must tidy her room before she goes out. must I go to bed now? when must we decide about the party? WE USE MUSN´T TO SAY SOMETHING IS PROHIBITED. you musn´t leave your bags here.

MUSTN´T / DON´T HAVE TO

MUST / HAVE TO

• THEY HAVE COMPLETELY DIFFERENT MEANINGS.

YOU MUSTN´T GO. (IT´S PROHIBITED, YOU CAN´T) YOU DON´T HAVE TO GO. (YOU CAN GO IF YOU WANT BUT IT IS NOT MANDATORY /NECESSARY)

• HAVE TO = GENERAL OBLIGATION (A RULE AT WORK, SCHOOL OR A LAW)
• MUST = PERSONAL OBLIGATION (ONE THAT THE SPEAKER IMPOSES)

BUT OFTEN WE CAN USE EITHER MUST OR HAVE TO.

IMPERSONAL YOU

DON´T FORGET THIS!

• WE OFTEN USE HAVE TO AND MUST WITH IMPERSONAL (YOU)

• YOU = PEOPLE IN GENERAL
• YOU HAVE TO WEAR A SEATBELT IN A CAR.
• YOU MUSN´T TAKE PHOTOS IN THE MUSEUM.

THANKS!