1. ADULTS IV UNIT 5C have to, dont have to, must, mustnt

2. MUST / MUSTNT + She must tidy her room before she goes out. - You mustnt smoke in class Use must+infinitive to talk about rules and obligations. Use mustnt+infinitive to say something is prohibited. 3. HAVE TO / DONT HAVE TO + She has to get up at 7.oo everyday. - He doesnt have to work on Saturdays. Use have to+infinitive to talk about rules and obligations, or to say something is necessary. Use dont have to+infinitive to say there is no obligation, or something is not necessary. 4. 1) Dont contract have or has. I have to go. NOT Ive to go. 2) Must and have are very similar, but there is a small difference. We normally use have to for a general obligation (a rule at work). We normally use must when the speaker imposes the obligation. 5. Choose the correct option You .. smoke in this room. A) Must B) Mustnt C) dont have to 6. Choose the correct option I . do my homework. A) Must B) Have to C) dont have to 7. Choose the correct option We . be quiet. A) Must B) mustnt C) dont have to 8. Choose the correct option You . make noise in this area. A) Must B) mustnt C) dont have to 9. Choose the correct option You . put the rubbish into the bin. A) Must B) mustnt C) dont have to 10. Choose the correct option You . Take photos in this museum. A) Have to B) mustnt C) dont have to 11. Choose the correct option You . speak on the phone on an aeroplane. A) Have to B) mustnt C) dont have to 12. Choose the correct option You . swim in this river. Its dangerous. A) Have to B) mustnt C) dont have to 13. Choose the correct option The traffic light is red. You . stop! A) Have to B) must C) dont have to 14. MODIFIERS (They modify the adjective). Learning Chinese is incredibly difficult!