An English-Zone.Com Lesson: Have to / Has to / Don't have to / Doesn't have to

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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