modal verb have to - don't have to ppt..

Modal verbs: have to / don't have to

1. HAVE TO / DON’T HAVE TO

2. We use have to to talk about strong obligation that comes from somewhere else , for example from you boss, you parents, a rule at school or work. I have to be at home by ten. (My parents told me so.) I have to get up early, because I start work at 8. (It is a rule.)

3. Don't have to means that there isn't any obligation at all, there is no need to do it. I don't have to get up early at weekend. (I can stay in bed as long as I want.) You don't have to go with me. (You can go somewhere else.)

4. Would you like to go to cinema with us? Yes, of course. I don’t have to cook tonight.

5. He doesn’t have to use a ladder.

6. I have to wear a suit at work.

7. I have to make my bed.

8. My mom did the dishes. I don’t have to wash them.

9. I don’t have to clean my room today.

10. Students have to do their homework.