Transcript MUST

MUST and HAVE TO
Modal auxiliary verbs
FORM
Must + V1 (base verb)
Have to + V1 (base verb)
Examples:
I must go home.
You have to do your homework.
USE
Must = I believe it’s true
Have to = It’s based on a fact
Examples:
It’s getting dark, I must go now.
You have to fasten your seat belt when driving.
Positive, negative and questions
MUST
HAVE TO
• -s
• -s
He must study hard if he wants to go
to university.
• don’t mustn’t = not allowed
You mustn’t touch pictures in the
museum.
He has to take an exam at the end of the
year.
• don’t have to = isn’t necessary
You don’t have to go if you don’t want.
• Do
• Do
Must I go?
Do I have to write it all?
SHOULD
• Form
Should + V1 (base verb)
You should learn more.
don’t
You shouldn’t meet him.
Do?
Should I accept the offer?
• Use
Should = advice, it would be a good idea
Should and Must
• Should = advice
• Must = strong
recommendation
I think you should read
more, you would be more
intelligent.
I don’t think you should eat
that, it smells terrible.
You must go to the doctor,
because it looks serious.
You must see that film,
because it was fantastic.
Example Sentences
•
•
•
•
•
•
You mustn’t walk on the grass.
You shouldn’t tell lies, it’s bad.
I must be back by 8o’clock.
She has to take her son to school.
You should stop smoking.
Children don’t have to go to school on
Saturday.