It expresses • Past ability He could lift 50 kilos when he was young • Formal requests Couldyou leave your luggage here, please?. It expresses • Ask for Permission: May I borrow yo
Trang 1Modal auxiliary verbs are verbs that cannot stand alone in a sentence; they must
be followed by a main verb which is always in the infinitive.
e.g He can speak three languages
She must take care of her teeth
It expresses:
• Ability to do something
e.g Birds can fly
• Polite request
e.g Can you help me with my grammar
exercise?
• Ask for Permission
e.g Can I leave now?
• Forbidding doing something
e.g You can’t smoke in this area
• Possibility
e.g This potion can kill anyone
It expresses
• Past ability
He could lift 50 kilos when he was young
• Formal requests
Couldyou leave your luggage here, please?
• Ask for permission
Could I stay here, please?
It expresses
• Ask for Permission:
May I borrow your umbrella, please?
• Future Possibility (not sure):
William didn’t come to school today He
may be ill
• Wish:
May God bless you
It expresses
• Remote possibility (less sure):
There are no clouds in the sky but it might
rain
• Warning
Don’t swim here; you might be attacked by sharks
• Suggestion
“I need to buy some cloths” “well you might
come with me I’m going to do some shopping
as well.”
Trang 2It expresses:
• Obligation:
e.g In Algeria, car drivers must attach
their security belt
• Prohibition (negative obligation)
e.g You mustn’t drive so fast
Affirmative form: “have to” expresses
• Obligation
e.g In Algeria pupils have to wear
pinafores
Negative form “don’t have to” expresses
• Lack of obligation e.g You don’t have to do all the work today,
you can finish it tomorrow
In the past tense “had to” expresses
• Obligation in the past
e.g I had to finish all the work before noon
1 God give you success in your work!
2 He dance the Salsa when he was young
3.she speak four foreign languages
4 Anyone make such mistakes
5 I'm afraid I not tell you her secret
6 They not understand it because it was too difficult
7 We win this match
8 You have good manners
9 you live in prosperity!
10 An elephant not fly
11 They finish this work today
12 We obey our parents
13 you shouldn’t eat too much sugar You have diabetes
Trang 3Consider the situations below and choose the most appropriate modal from the modals between brackets and put it in each of the blanks
a A pedestrian/ in the street
Excuse me, officer, (may/can/could) you show me the way
to Victoria Station please?
b A pupil/ in the classroom
(could/can/may) I borrow your protractor, said? I’ve forgotten
mine at home
c Immigration officer/ at the airport
(can/could/may) I see your passport?
d In the classroom
Teacher: where’s Marry? Why is she absent?
Pupil: I don’t know She _ (can/may/could) be at the hospital
e Pupils/ in the headmaster’s office
Pupils: _ (can/will/may) we leave now, Mr White?
Headmaster: no, you (can’t/may not/couldn’t) you haven’t
answered all my questions
Put the following modals in the right place: can, could, must, may, might
It is the Election Day, every citizen _ vote
It was a bad accident; we have been killed
Mary _ not be ten Before two years, she was six years old
She be eight now
This restaurant is always full of people It _ be excellent
My father travelled a lot so he speak five languages
He told me a strange story but it _ be true
_ I see your passport, please?
I don’t want anyone to know about our plan You _keep the
secret
It was your fault You _ apologize
I am a tourist and I _ not find Maqam El Chahid _ you
show me the way, sir?
Trang 4Exercise 1
May – could – can- can –must- could- Can/must- must-may-can-have to-must-might
Exercise 2:
could- can- may-may-may-may not
Exercise 3
Must- could- can- must- may – can- may- may- must – must- can - could