4. Make the active sentences passive. Use modal verbs.

(Làm cho câu chủ động bị động. Sử dụng động từ khiếm khuyết.) 

1. You mustn’t eat those mushrooms.

Those mushrooms mustn’t be eaten.

2. They needn’t cancel the concert.

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3. We mustn’t use mobile phones during lessons.

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4. You have to write your name in capital letters.

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5. We must hand in homework on time.

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6. You have to wear school uniforms to school.

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2. Read and listen to the dialogue and circle the correct verbs.

(Đọc và nghe đoạn hội thoại và khoanh tròn vào động từ đúng.)

Host: This question is for £125,000. Jill, in the sitcom How I Met your Mother, what is Ted Mosby's job? Is it A, lawyer, B, designer, C, architect. or D, reporter?

Jill: Um ... I'd like to ask the audience, please.

Host: OK. Audience, you (1) must / mustn't answer A, B, C or D on your keypads ... now! ... OK, 30% think it's B and 50% think it's C. But you (2) mustn't / needn't take their advice.

Jill: Mmm, I think I'll phone my friend Danny;

Host: OK, let's ring Danny .... Hello, Danny. Jill has a question worth £125,000. You (3) must / needn't answer within thirty seconds. OK?

Jill: Hi, Danny. In the sitcom How I Met your Mother, what is Ted Mosby's job? ls it A, lawyer, B, designer,

C, architect. or D, reporter?

Danny: Um, I think it's B ... or maybe C ... No, it's D...

Host: Sorry, you're out of time. But you (4) don't have to / must answer the question. You can walk away with

£64,000.

Jill: I'm going to answer C

Host: Final answer?

Jill: No. Yes. No

Host: You (5) don't have to/ mustn't change your mind!

Jill: The answer is B. Final answer.

Host: Oh, Jill, the answer is C, architect You've just lost £32,000.

3. Read the Learn this! box and complete the rules. Use must, mustn't, needn't and don't have to. Use your answers to exercise 2 to help you.

(Đọc hộp Learn this! và hoàn thành các quy tắc. Dùng must, mustn't, needn't and don't have to. Sử dụng các câu trả lời trong bài 2 để giúp bạn.)

LEARN THIS! must, mustn't and needn't/ don't have to

a. We use (1) _____ to say that something is necessary or very important to do.

b. We use (2) _____ and (3) _____ to say that something is not necessary.

c. We use (4) _____ to say that something is prohibited (a negative order)

Note: We can also use passive forms after modal verbs.

Helmet must be worn at all times.

4. What are the rules for using mobiles at your school? Write sentences with must, mustn't and needn't and the phrases below. If you can, add ideas of your own.

(Những luật lệ cho việc sử dụng điện thoại ở trường của bạn là gì? Viết các câu với must, mustn’t và needn’t với các cụm từ bên dưới. Nếu có thể, hãy thêm vào ý tưởng riêng của bạn.)

Using mobiles

bring our mobiles to school

leave them in our bags

put them on our desk during lessons

keep them on silent all day

send texts during lessons

5. Read the Look out! box. Then, using the words in brackets, rewrite the sentences so that they have the same meaning.

LOOK OUT!

a. must and have to are very similar. However, must often expresses the feelings of the speaker. (must và have to rất giống nhau. Tuy nhiên, must thường thể hiện cảm xúc của người nói.)

You must do more exercise. (That's my strong opinion.) (Bạn phải làm nhiều bài tập hơn nữa.) (Đó là một quan điểm rất mạnh.)

have to often expresses an external obligation. (have to thường chỉ sự bắt buộc từ bên ngoài.)

You have to wear a helmet. (It's the law.) (Bạn phải đội mũ bảo hiểm.) (Đây là luật.)

b. mustn't and don't have to do NOT have the same meaning. don't have to = needn't, but mustn't means 'it is prohibited’.  (mustn’t và don’t have to không cùng nghĩa. don’t have to = needn’t, nhưng mustn’t nghĩa là “nó bị cấm”.)

1 It isn't necessary for you to help me. (needn't)

2 It's compulsory for us to wear school uniform. (have to)

3 You aren't allowed to talk in the exam. (mustn't)

4. It's important that you listen to me. (must)

5. You needn't write the answer. (have to)

6. Work in pairs. Ask and answer about the rules of a game show you know. Use must, mustn't and needn't / don't have to. Can your partner guess the name of your game?

(Làm việc theo cặp, Hỏi và trả lời về những luật của một game show bạn biết. Dùng must, mustn't and needn't / don't have to. Bạn của bạn có đoán được tên game đó không?)

3D. must, mustn’t and needn’t/ don’t have to

5. Circle the correct answers.

(Khoanh tròn vào đáp án đúng.)

1. You must / mustn't finish your breakfast or you'll be hungry later.

2. I must/ mustn't leave before 8.30 or I'll be late for school.

3. You must/ mustn't eat that bread. It's a week old!

4. In football, you must/ mustn't touch the ball with your hand.

5. You must/ mustn't visit Paris some time. It's a wonderful city.

6. You must/ mustn't go near the edge of the cliff. It's very dangerous.

6. Complete the sentences with must, mustn't or needn't.

(Hoàn thành các câu sau với must, mustn’t, needn’t.)

1. You _____ take off your shoes if they are clean.

2. Students _____ turn off their mobiles during lessons or the teacher will take them away.

3. You _____ go to the check-in desk if you have checked in online.

4. In most Arab countries, you _____ eat with your left hand. You should use your right hand.

5. When you're driving, you _____ stop if someone steps onto the pedestrian crossing.

6. We _____ waste any more time.

7. Complete the sentences with must or have to and the verbs below.

(Hoàn thành các câu sau với must hoặc have to và các động từ bên dưới.)

drive   eat   get up   phone   stop   take   take   wear

1. At school, we _____ a white shirt and a blue sweater.

2. We _____ at the new Chinese restaurant in town. I've heard it's really good.

3. In Britain, we _____ on the left.

4. Sue really _____ eating so many sweets - it's bad for her teeth!

5. You _____ your grandparents more often. You know how much they enjoy talking to you.

6. We _____ exams at the end of our final year at school.

7. Jason _____ early because he's got a doctor's appointment at eight in the morning.

8. Complete the sentences with a modal verb followed by a passive infinitive. Use the words in brackets.

(Hoàn thành các câu với một động từ khuyết thiếu theo sau bởi một nguyên thể bị động. Sử dụng các từ trong ngoặc.)

1. During lessons, your mobile phone _____ in your bag. (must / leave) 

2. Meat _____ right through. (need / cook) 

3. School uniforms _____ on the school trip. (not need / wear) 

4. Books ____ out of the library. (must not / take)

1. Choose the correct verbs to complete the dialogue.

(Chọn các động từ chính xác để hoàn thành đoạn hội thoại.)

2. Complete the sentences with mustn’t or don’t / doesn’t have to.

(Hoàn thành các câu với mustn’t hoặc don’t / doesn’t have to.)

1. He’s a brilliant student – he _______________ work hard to get good marks.

2. You can stay up late, but you _______________ make a lot of noise and wake up your sister.

3. We _______________ forget the name of our hotel.

4. She always pays by credit card so that she _______________ carry a lot of money with her.

5. You _______________ tell Jack about the party – it’s a secret!

6. The bus leaves at 9 a.m. exactly, so you _______________ be late

7. We__________________ wear a uniform to school, but we _______________ wear jeans or trainers.

3. Look at the advert for the quiz night. Then complete the sentences with must / have to, mustn’t or don’t have to / needn’t. Sometimes more than one answer is possible.

(Nhìn vào quảng cáo cho đêm đố vui. Sau đó, hoàn thành các câu với must / have to, mustn’t hoặc don’t have / needn’t. Đôi khi cũng có khả năng có nhiều hơn một câu trả lời.)

5. Write sentences about rules at school. Use have to, must and needn’t and the ideas below. If you can, add your own idea.

(Viết câu về nội quy ở trường. Sử dụng have to, must và needn’tvà những ý tưởng bên dưới. Nếu bạn có thể, hãy thêm ý tưởng của riêng bạn.)

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