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questions for discussion
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Modal verb, a kind of auxiliary verb, is often used to express
permission, obligation, ability…etc
Ex: We should to get up early every morning.
Note:
Some full verbs are used to express the obligation : to have to,
to have got to, to be allowed
Ex: You do not have to get up early on Sunday
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Please put these verbs in the correct column
Permission
Obligation
can should must be allowedmay have to
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Please give the rule of Mv
(+) S + mv+ Vinf + O
I can stay at my grandfather’s tonight.
(-) S + mv + not + Vinf + O
You should not stay up late.
(?)Mv + S + Vinf +O Yes, S + mv
No, S + Mv +not
Can I park here? Yes, you can
No, you can not
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Unit 4 Do the right thing
Grammar


have to
can’t
aren’t allowed
have got to have got to
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Unit 4 Do the right thing
Grammar - Practice
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Grammar - Practice
Make question using have to or had to
Example
We had to get up very early to catch the bus
What time
did you have to get up early?
a. My mother has to go abroad a lot ( How often)
How often
does your mother have to go abroad?
b. I have to leave tomorrow morning( What time)
What time
do you have to leave tomorrow morning
?
c. We had to waited for ages( How long)
How long
did you have to waited
?
d. I had to take my car to the garage ( Why)
Why
did


wear seatbelts
You can not
skateboard here
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You will hear Bert Atkins, who was born in 1949,
talking about his school days.
What does he say about the followings?
Knitting
Papers and pencil
Chalk and a slate
The Big Boys
school
Exams
Walking to school
A bike
Leaving school
Talking in class
Writing lines
homework
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Knitting: All the children had to learn to knit
Paper and pencils: they weren’t allowed to use paper and pencils until they were
seven
Chalk and slate: they had to use chalk and slate for the first two years
The ‘ Big boys' school: he went to the Big boys school when he was ten
Exams: he didn’t have to take any exams to go to Big boys school
Walking to school: they had to walk to school
A bike: he didn’t get a bike until he was 14
Leaving school: everyone to leave school at 14
Talking in class: they weren’t allowed to talk in class

d. ….take anything valuable
e. … go to Australia first
f. ….go to Indonesia by boat
g. …wait too long before we go
B
We might loose it
I’ve got some friend who’ll put us
up
I want to get started
It’ll have some good ideas about
where to go and where to stay
It’ll be really hot
We won’t be able to carry it all
It’ll be cheaper than flying.
You can make suggestion like this:
I think we should take plenty of sun cream because it’ll be
really hot
I don’t think we should put too much in our backpack because
we won’t be able to carry it all
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Unit 4 Do the right thing-
Practice
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Must
express a strong obligation
All visitor must report to Reception
Have to
expresses a general obligation based on a law or a rule
Nurses have to wear a uniform
Sometimes

2. a. We must go to Paris some time Another boring business trip.
Yawn!
b. We have to go to Paris next week It would be really nice
3. a. I must wear something nice to the It’s the rule
disco
b. Men have to wear shirt and tie to I want to look good
go to the posh restaurant
4. a. You must register for next term before It says on the notice board
Thursday
b. You have to register for next term before One student is talking to another
Thursday students
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Unit 4 Do the right thing
Practice
Can you help me?
What time do you have to start work?
We aren't allowed to wear jeans at school
We can not do what we want
My mother has to
work very hard six days a week
You should not smoke
Passengers must have a ticket