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NECESSITY and LACK OF NECESSITY
Complete the chart:

AFFIRMATIVE SENTENCES
SUBJECT
MODAL
VERB
EXAMPLES
affirmative sentences
( + )

NECESSITY:
have to/has to

meaning: It is necessary.

I
you
we
they
have to
clean
get
pick up
buy
.
eat
go
work
 I   have to clean    my room.
You ________________ a new shirt.
We _________________ the laundry.
They __________________ a notebook.
he
she
it
has to
He   has to eat    dinner now.
She ________________ to work.
It _____________________.

NEGATIVE SENTENCES
SUBJECT
MODAL
VERB
EXAMPLES
negative sentences
( - )

LACK OF NECESSITY:
don't have to
doesn't have to

meaning: 
It is not necessary.
You have a choice.

I
you
we
they
don't have to
work
do
clean
eat
.
work
go
be
 I ___________________ on Saturday.
You ____________________ that.
We _____________________ the car.
They  don't have to eat   pizza.
he
she
it
doesn't have to
He _____________________ tomorrow.
She ______________________ today.
It _____________________ that way.
 
QUESTIONS
DO
SUBJECT
MODAL
VERB
EXAMPLES
questions
( ? )
Do
I
you
we
they
have to
clean
buy
pick up
have
.
eat
go
work
____ I ______________ my room?
 Do you  have to buy a new pen?
____ we ____________ the laundry?
____ they ____________ a notebook?
Does
he
she
it
____ he ____________ dinner now?
____ she ___________ to work now?
____ it _________________?

 
 
Section A:   Pizza!
(necessary)
(not necessary)
1. When you make pizza, you ___ have some pizza sauce. a) have to
b) has to
c) don't have to
d) doesn't have to
2. You also ___ have some cheese on top of the pizza. a) have to
b) has to
c) don't have to
d) doesn't have to
3. You ___ have peppers on your pizza, but you can if you want to. a) have to
b) has to
c) don't have to
d) doesn't have to
4. A good pizza ___  taste good. a) have to
b) has to
c) don't have to
d) doesn't have to
5. So, you ___ choose the pizza toppings that you like best. a) have to
b) has to
c) don't have to
d) doesn't have to
6. Personally, I love tomatoes, so I always  ___ have tomatoes on my pizza! a) have to
b) has to
c) don't have to
d) doesn't have to
7. You ___ make your own pizza, you can buy a pizza from a pizza shop if you want to. a) have to
b) has to
c) don't have to
d) doesn't have to
8. Pizza tastes best when it's hot, but you ___ eat hot pizza. You can eat it cold too. a) have to
b) has to
c) don't have to
d) doesn't have to

 
 
Section B:   On Health...
9. People ___ eat food to stay alive. a) have to
b) has to
c) don't have to
d) doesn't have to
10. People ___ eat pizza and candy to stay alive. They can choose healthy food. a) have to
b) has to
c) don't have to
d) doesn't have to
11. A person ___ drink water to stay alive. a) have to
b) has to
c) don't have to
d) doesn't have to
12. A person ___ smoke cigarettes to stay alive. a) have to
b) has to
c) don't have to
d) doesn't have to

 
 
Section C:   Help Wanted:
Help Wanted: Secretary. No experience necessary. Must type 50 words per minute. Work Monday - Friday, weekends off. Answer phones, use computer, file reports.
 
13. The secretary ___ know how to type. a) have to
b) has to
c) don't have to
d) doesn't have to
14. A secretary ___  be a woman. The secretary can be a man. a) have to
b) has to
c) don't have to
d) doesn't have to
15. ___ the secretary ___ work Saturdays? a) Do / have to
b) Does / have to
c) Do / has to
d) Does / has to
16. No, he/she ___  go to work on saturdays. a) have to
b) has to
c) don't have to
d) doesn't have to
17. The secretary also ___ answer the company's phones.... a) have to
b) has to
c) don't have to
d) doesn't have to
18. ...and he/she ___ file reports every week. a) have to
b) has to
c) don't have to
d) doesn't have to
19. ___ the secretary ___ use a computer? a) Do / have to
b) Does / have to
c) Do / has to
d) Does / has to
20. Yes, He or she ___ use a computer. a) have to
b) has to
c) don't have to
d) doesn't have to
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