Modal Verbs.

Modals of Deduction
Complete the sentences by adding MUST, CANT, MIGHT (NOT), COULD (NOT) or MAY
(NOT)

1. You havent stopped working for hours. You ..................................... be exhausted!

2. She looks much older than him. They ..................................... be twins.
3. They look like tourist themselves, but they. ..................................... be able to show us
the way.
4. Well, it ..................................... her, but Im not sure.
5. I think shes seen the film before so she ..................................... want to see it again.

C- Your neighbour is a foreigner visitor. Give advice about the city Use the modals in the
box below.
Should/ shouldnt 1-
Can / cant
Must / mustnt
Have to ______________________________________________________
Dont have to
Need to / neednt ____
2-

______________________________________________________

____
3-

______________________________________________________

____
4-

______________________________________________________

____
5-

______________________________________________________

____
D- Rewrite the sentences using a form of must, have to or should.

1- Youre not allowed to take photos.

You _________________________________________________________________________
2- Its automatic. Its not necessary to switch it on.
Its automatic. You______________________________________________________________
3- Its very important that I remember to post this letter.
I___________________________________________________________________________
4- Nursery school is not compulsory in Britain.
In Britain children______________________________________________________________
5- Its not a good idea to drive when youre tired.
You_____________________________________________________ ___________________

Make sentences about what you must or mustnt do in a THEATRE.

1. speak loudly
2. shout
3. be quiet
4. sit down
5. stand up
6. smoke
7. put your feet on the seats
8. watch without talking
9. arrive late
10. arrive on time
5
Rephrase the sentences using must, mustnt, should or shouldnt.
1. Its a good idea to visit the dentist every six months.

2. Dont chew gum in class.

3. It isnt a good idea to eat so much.
4. It isnt a good idea to watch television all day long.

5. Do all your homework.

6. Its a good idea to go to the gym twice a week.

7. It isnt a good idea to play video games all the time.

8. Dont write on the desk.

Make suggestions. Use I think you should

Eg. Im freezing! (heating) I think you should turn on the heating.
1. I have a temperature. (doctor)
2. Its too hot in this room. (window)
3. Im thirsty. (something to drink)
4. Im sleepy. (bed)
5. Im not very fit. (exercise)
6. Im tired. (rest)
7. I have toothache. (dentist)
8. I cant remember the words. (dictionary)
3
I think you should / Why dont you?

MODALS: MUST, HAVE TO & SHOULD.

Modals of obligation

MUST
We usually use must when you think something is necessary or important.
I must leave now. I dont want to be late.

MUSTNT
We use mustnt to tell someone not to do something. (Prohibition)
Father: You mustnt pull the cats tail.

HAVE TO
We use have to when a law or another person says that something is necessary.
We have to wear a uniform at my school.

DONT /DOESNT HAVE TO

We use dont have to or doesnt have to when something is not necessary.
I dont have to wear a uniform at my school. I can wear what I like.

SHOULD
We use Should to give advice and to say what we think it is good or right.
You should eat fruit every day.

SHOULDNT
We use Shouldnt when you think its not a good thing to do.
Tom shouldnt go to bed so late.

Match sentences from B to go with the sentences in A. Use

must or mustnt.
A B
1. Youre ill. You/go/near it.
2. Im very thirsty I/go/to the opticians-
3. That dog is dangerous. You/come.
4. My glasses are broken I/hurry.
5. Its Joes birthday soon. I/go/to bed.
6. My room is a mess. We/make/any noise.
7. Im late for work. You/see/a doctor.
8. Be quiet. I /have /a drink.
9. Im very tired. I/tidy/it.
10. Were having a party on Saturday. We /forget/to send him a card.

..

.
..
.
 Write sentences about life at school. Use
have to. Complete each sentence with should.
wear a Its a good idea to wear a warm coat.
uniform ............................................... You .................................................................
.......
do My advice is to leave early.
homework ....................................... I think you .......................................................
..............
sit in the same
Its a good idea to take more exercise.
place ....................................................
arrive before You ......................................................................
8.00 ....................................................
eat lunch at In my opinion, its a good idea for you to read a lot.
school .................................................... I think........................................................................
change
rooms .............................................. Its a good idea to do that.
...... You..............................................................................
do My advice for you is to ride a bike.
gym ....................................... I think .................................................................................
.............
learn
English ........................................... Complete the sentences. Use must + one of these verbs:
..........
Be go go learn meet wash win
1. We ...................... to the bank today. We havent got any money.
2. Marilyn is a very interesting person. You ............................. her.
3. My hands are dirty. I ........................................... them.
4. You .............................. to drive. It will be very useful.
5. I .............................. to the post office. I need some stamps.
6. The game tomorrow is very important for us. We ..........................................
7. You cant always have things immediately. You .................................. patient.

MAKE NEGATIVE SENTENCES

A) Kate has to take an exam tomorrow. ...............................................................................................
B) Jim has to get up early. .....................................................................................................................
C) I have to make a phone call. ............................................................................................................
D) George has to do the shopping. .....................................................................................................
E) You must sit here. ...............................................................................................................................
F) We have to decide now. .....................................................................................................................
G) Helen has to do her homework. .....................................................................................................
H) You must forget about it. ...............................................................................................................

Complete the sentences. Use must + one of these verbs:

Be go go learn meet wash win
8. We ...................... to the bank today. We havent got any money.
9. Marilyn is a very interesting person. You ............................. her.
10. My hands are dirty. I ........................................... them.
11. You .............................. to drive. It will be very useful.
12. I .............................. to the post office. I need some stamps.
13. The game tomorrow is very important for us. We ..........................................
14. You cant always have things immediately. You .................................. patient.

MAKE NEGATIVE SENTENCES

I) Kate has to take an exam tomorrow. ...............................................................................................
J) Jim has to get up early. .....................................................................................................................
K) I have to make a phone call. ............................................................................................................
L) George has to do the shopping. .....................................................................................................
M) You must sit here. ...............................................................................................................................
N) We have to decide now. .....................................................................................................................
O) Helen has to do her homework. .....................................................................................................
P) You must forget about it. ...............................................................................................................