Unit3.LF

should
must
ought to
can
have to
may
modals


I. Modal verbs:
S + Modal verb + V.(inf) + O.
a. must:
Phải: mang tính chất chủ quan.
b. have/has to:
c. Ought to = should:
Nên: lời khuyên.
Phải: mang tính chất khách quan.
Examples:
•
You must do your homework at home.
•
We have to wear uniform at school.
•
You should not/ ought not play video games.

Match each verb with suitable picture.
feed
empty
tidy

sweep
dust
clean
a)
b)
c)
d)
e)
f)

•
Nga: Can you come to the movies, Lan?
•
Lan: No. I my chores.………………
•
Nga: What do you have to do?
•
Lan: I(1) . my bedroom. Then I (2) . …………… ……………
•
the living-room and I (3) the kitchen floor, …………………
too.
•
Nga: That won’t take long. What else?
•
Lan: I(4) . the fish tank ……………………
and then I(5) the garbage ……………………
Finally, I(6) the dog.……………………
•
Nga: Ok. Let’s start. Then we can go out.
have to / must do

have to tidy
have to sweep

have to dust
have to clean
have to empty
have to feed
LF1. Complete the dialogue with “must or have to”

4. Practice.
a . Language focus 1: Complete the dialogues.
b. Language focus 2: Use Ought to to give advice to
these people


You ought to study
harder.
LF2. Use ought to or should to give advice:

Use “ought to / should” to give advice for these people.
You ought to
get up earlier.
You ought
to eat more
fruit and
vegetables
You ought to
go to the
dentist.

•
I
•
You
•
We
•
They
•
He
•
She
•
It
•
Yourself/ Yourselves
•
Themselves
•
Herself
•
Himself
•
Itself
•
Ourselves
•
Myself
II. Reflexive pronouns:
Pronouns Reflexive pronouns

Complete these dialogues
ourselves
myself
yourself
himself
herself
themselves
yourselves

She’s late for school.
Because she watched TV late last night.
Why is Hoa late for school?
III. Why and Because

Nam had
to cook
dinner.
Ha failed
her
English
test.
Nga didn’t
go to the
movies.
Mrs. Vui
was
home
late.

Answer keys
a) Why did Nam have to cook dinner?
Because his mother was home late.
b) Why was Mrs.Vui, Nam’s mother home late?
Because she had to come to see her mother.
c) Why did Ha failed her English test?
Because didn’t learn for her exam.
She played the computer game.
d) Why didn’t Nga go to the movies?
Because she had to do her chores.

Choose words in the box to fill in the blanks.
myself, because, should, ought, must
a) We are students. We ………… go to school on time.
b) You ………… to get up earlier.
c) Look at the pictures on the wall. I drew it …………….
d) Why was she home late yesterday?
………… she had a lot of things to do at school.
e) You ………… do your homeworks.
myself
should
Because
ought
must

Homework
•
Learn grammar notes by heart.
•
Write all exercises into your notebooks.

•
Do exercise 1 to 5, page 20-24 in the workbook.
•
Prepare the next lesson (Review).