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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
have
eat
go
work
I have to clean my room.
You have to get a new shirt.
We have to pick up the laundry.
They have to have a notebook.
he
she
it
has to
He has to eat dinner now.
She has to go to work now.
It has to work.

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

 
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:   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.
Read the advertisement, then choose the correct words below.
9. The secretary ___ know how to type. a) have to
b) has to
c) don't have to
d) doesn't have to
10. 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
11. ___ the secretary ___ work Saturdays? a) Do / have to
b) Does / have to
c) Do / has to
d) Does / has to
12. No, he/she ___  go to work on saturdays. a) have to
b) has to
c) don't have to
d) doesn't have to
13. The secretary also ___ answer the company's phones.... a) have to
b) has to
c) don't have to
d) doesn't have to
14. ...and he/she ___ file reports every week. a) have to
b) has to
c) don't have to
d) doesn't have to
15. ___ the secretary ___ use a computer? a) Do / have to
b) Does / have to
c) Do / has to
d) Does / has to
16. Yes, He or she ___ use a computer. a) have to
b) has to
c) don't have to
d) doesn't have to

 
Section C:   On Health...
17. People ___ eat food to stay alive. a) have to
b) has to
c) don't have to
d) doesn't have to
18. 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
19. A person ___ drink water to stay alive. a) have to
b) has to
c) don't have to
d) doesn't have to
20. A person ___ smoke cigarettes to stay alive. a) have to
b) has to
c) don't have to
d) doesn't have to
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