Must, must not (mustn’t), have to, don’t have to

…, the … of January. Classwork. Must, must not (mustn’t), have to, don’t have to

Must/ mustn’t1. We use must and mustn’t to talk about rules and obligations: You must switch off your mobile phone in the classroom.2. We don’t often use must in the question form. We prefer to use Do/Does … have to…?Do I have to wear a swimming hat?{5 C22544 A-7 EE6-4342-B048-85 BDC9 FD1 C3 A}Positive. I/you/ he/ she /it/ we /they must go. Negative. I/you/ he/ she /it/ we /they mustn’t go.

Practice (Student’s book p.156)1. Write complete sentences with must or mustn’t.0. x you/walk on the grass. You mustn’t walk on the grass.1. v they/ fill in the form2. x we/ forget Mum’s birthday3. x my cousin / wear large earrings to school.4. v you / practise for an hour every day.5. v you/ be careful.

have to, don’t have to{5 C22544 A-7 EE6-4342-B048-85 BDC9 FD1 C3 A}Positive. I/you/ we /they have to go. He/ she /it has to go. Negative. I/you/ we /they don’t have to go. He/ she /it doesn’t have to go. Questions Do I/you/ we /they have to go. Does he/ she /it have to go. Short answers. Yes, I/you/ we /they do. Yes, he/ she /it does. No, I/you/ we /they don’t. No, he/ she /it doesn’t.

have to, don’t have to. We use have to to say something is necessary and don't have to to say something isn't necessary. You have to bring sandwiches. (= you need to bring)but You don't have to bring a drink. (= you don't need to bring)

Practice (Student’s book p.156-157)2. Complete the sentences and questions with the correct form of have to and the verb in brackets.0. Do you have to join (join) a club to play this sport?1 Today's Saturday. I ______(not go) to bed early.2 My mum _______(work) in London this week.3 What time _______your sister ________(come)home when she goes out? 4 My uncle has got problems with his back. He ________(go) swimming every day.5 We _______(not watch) the film, we can play a game instead.

Must and have to• Must and have to are similar. I've got a test tomorrow. I must study. or I have to study.• Mustn't and don't have to are different. You mustn't be late for class. (= you can't be late. It's the rule.)You don't have to bring your own equipment. (= it isn't necessary but you can if you want.)• In the past, we use had to for must and have to. I didn't watch the film because I had to study.• The past of don't have to and do you have to is didn't have to and did you have to. Did you have to stay at school late yesterday? No, I didn't. My mum didn't have to go to work this morning, so she drove me to school.

Practice (Student’s book p.157)3. Choose the correct words to complete the sentences.0. You don't have to / mustn't help me but you can if you want.1. When I was younger, I had to / must go to bed at 8 p.m.2. No ball games, please! You don't have to / mustn't play football here.3. Do you have to / Must you leave now? It's very early.4. I don't have to / mustn't wear a swimming cap at my pool, but I usually wear one.5. Shh! My sister's sleeping! We don't have to / mustn't wake her.