99 bài tập “must” và “have to” có đáp án giúp dễ dàng phân biệt

phân biệt "must" và "have to"

“Must” và “Have to” đều là những đơn vị ngữ pháp chúng ta thường bắt gặp và sử dụng. Chúng ta dùng chúng để miêu tả sự bắt buộc/ cần thiết và quy định phải làm một hành động nào đó. Xét về mặt ý nghĩa chúng đều có nét tương đồng. Tuy nhiên, trong những trường hợp nhất định Must và Have to cả hai đều phải tuân theo một quy định luật nhất định. Cùng Edison Schools tìm hiểu những mẹo phân biệt “must” và “have to” nhé!

Must

  • Must tương đương như từ “phải” trong tiếng Việt. Nó diễn tả một sự bắt buộc, quy định hoặc một mệnh lệnh.

Ví dụ:

You must finish your meal before 9.00pm. ( Bạn phải ăn xong trước 9 giờ tối)

You must wash your hands before you eat. ( Bạn phải rửa tay trước khi ăn)

She must go to bed early. ( Bạn phải đi ngủ sớm)

  • Must được sử dụng để kết luận một sự việc theo ý kiến chủ quan của người nói cho rằng nó là điều đương nhiên.

Ví dụ: 

  • He passed his midterm exam. He must be so happy. ( Anh ấy thi đậu bài thi giữa kì.  Chắc anh phải ấy vui lắm.)
  • Anna look so sad. She must be scolded by her mother. ( Anna nhìn có vẻ rất là buồn. Chắc cô ấy bị mẹ la.)

Have to

  • Have to miêu tả một hành động chủ quan mà người nói cho rằng họ “phải” làm.

Ví dụ:

I have to wash my hair once a day. ( Tôi phải gội đầu một lần một ngày)

I have to clean my shoes before I wear them. ( Tôi phải làm sạch giày của tôi trước khi tôi mang chúng)

  • Trong khi Must áp dụng được cho thì hiện tại hoặc tương lai thì Have to được áp dụng cho thì quá khứ. Cả hai đều mang nghĩa là phải.

Ví dụ: 

I must go to the swimming pool tomorrow. ( Thì tương lai ) ( Ngày mai tôi phải đi tới chỗ hồ bơi)

I had to go to the swimming pool yesterday. ( Thì quá khứ ) ( Đáng lẽ hôm qua tôi phải đi tới hồ bơi)

Phân biệt “must” và “have to” trong câu phủ định

  • Mustn’t là một quy định, lệnh ấm không được thực hiện một điều gì đó.

Ví dụ: 

You mustn’t dye your hair. ( Bạn không được nhuộm tóc)

Students mustn’t be late for school. (Học sinh không được đi học trễ)

  • Còn Don’t have to diễn tả một sự việc không cần thiết không mang tính bắt buộc.

Ví dụ: 

You don’t have to finish all your meals. (Bạn không cần phải ăn hết đồ ăn đâu)

You don’t have to brush your hair three times a day. ( Bạn không cần thiết phải chải tóc tận 3 lần một ngày)

Bài tập phân biệt “must” và “have to”

Bài 1:

  1. The bus goes at 10.15. She ………………….. leave at 10 if she wants to catch it.
  2. The British Library: Coats and bags ………………….. be left at the coakroom or in a locker.
  3. Jim can’t see very well. He ………………….. wear glasses.
  4. You ………………….. see the film. It’s fantastic.
  5. Johny, you ………………….. be nice to your mum.
  6. Oh, no. It’s Monday tomorrow. I ………………….. go to school again.
  7. English children ………………….. stay at school till they are 16.
  8. OK. You can go to the party, but you ………………….. be back before midnight.
  9. A flight attendant: “All mobile phones ………………….. be switched off during the takeoff.”
  10. The metro station is closed. I ………………….. get a taxi.

Answer:

  1. The bus goes at 10.15. She has to leave at 10 if she wants to catch it.
  2. The British Library: Coats and bags must be left at the coakroom or in a locker.
  3. Jim can’t see very well. He has to wear glasses.
  4. You must see the film. It’s fantastic.
  5. Johny, you must be nice to your mum.
  6. Oh, no. It’s Monday tomorrow. I have to go to school again.
  7. English children have to stay at school till they are 16.
  8. OK. You can go to the party, but you must be back before midnight.
  9. A flight attendant: “All mobile phones must be switched off during the takeoff.”
  10. The metro station is closed. I have to get a taxi.

Bài 2:

1.- At our school we __________ wear a uniform.
2.- You __________ cross the roads without looking. It’s
dangerous.
3.- You _______ turn on the central heating. It’s automatic.
4.- The exams are next week. I __________ work harder.
5.- You ________ forget your umbrella. It’s going to rain.
6.- Students _________ listen to the teacher or they
won’t understand.
7.- You _____ cross the road when the red light is showing.
8.- We __________ leave now or we’ll miss the plane.
9.- Soldiers ____________ obey orders.
10.- Sorry, I ___________ go now. I don’t want to be late.
11.- Shop assistants __________ deal with the public.
12.- You __________ come with us if you don’t want to.
13.- I was late this morning because I _________ wait a long time
for the bus.
14.- In Spain, teachers __________ wear uniforms.
15.- You ___________ take food in your room.
16.- You __________ use the elevators in case of fire.
17.- I _________ wear glasses because I can’t see very well.
18.- You ___________ read this book. It’s really good.
19.- You __________ go shopping today. We don’t
need anything.
20.- You __________ a mobile phone in class.
21.- We ___________ feed the animals. It’s forbidden.
22.- We _________ book the tickets before it’s too late.
23.- In Spain, teachers _________ work on Saturdays.
24.- In Britain you __________ drive on the left.
25.- Every player in a football team __________ have a number.
26.- You ___________ forget his birthday again.
27.- Doctors sometimes ___________ work at the weekend.
28.- Nowadays in Spain pupils ____ learn Latin at school.
29.- You __________ smoke on public places.
30.- My wife __________ go to work today. It’s a
holiday.
31.- You _________ shout. I can hear you.
32.- We ___________ be quiet in the library.
33.- You __________ use a computer on the plane.
34.- She ___________ come to the dentist’s with me.
35.- At a restaurant you _________ pay the bill but you __________
eat everything.

Answer:

1.- have to
2.- mustn’t
3.- don’t have
4.- must
5.- don’t have to
6.- must
7.- mustn’t
8.- must
9.- have to
10.- must
11.- have to
12.- don’t have to
13.- had to
14.- don’t have to
15.- mustn’t
16.- mustn’t
17.- have to
18.- must
19.- don’t have
20.- mustn’t
21.- mustn’t
22.- must
23.- don’t have to
24.- must
25.- hast to
26.- mustn’t
27.- have to
28.- don’t have to
29.- mustn’t
30.- doesn’t have to
31.- don’t have to
32.- have to
33.- mustn’t
34.- doesn’t have to
35.- have to / don’t have to

Bài 3:

1.- REWRITE THESE SENTENCES USING A MODAL (obligation / absence of obligation / prohibition )

a) It’s not necessary to go to school on Saturdays
You ………………………………………………………………………….
b) It’s obligatory for all drivers to have a driving licence
All drivers……………………………………………………………………
c) It’s compulsary for Peter to learn Spanish
Peter …………………………………………………………………………
d) It’s not obligatory for customers to go on the trips organized by the hotel
Customers ………………………………………………………………………………
e) Passengers aren’t allowed to smoke in this compartment
Passengers ………………………………………………………..
f) It ‘s necessary to book in advance
You …………………………………………………………………..
g) It’s essential to have a visa to travel to India
You …………………………………………………………………..
h) It’s not necessary for you to shout. I can hear you perfectly well
You ……………………………………………………………………………

Answer:

a) You don’t have to go to school on Saturdays
b) All drivers must have a driving licence
c) Peter has to learn Spanish
d) Customers don’ have to go on trips organized by the hotel
e) Passengers mustn’t smoke in this compartment
f) You need to book in advance
g) You need a visa to travel to India
h) You don’t have to shout. I can hear you perfectly well

Bài 4: CHOOSE THE CORRECT ANSWER

a) Liz _____________________ get tired of her job. It is so boring.
a. has to b. must c. could

b) Take an umbrella. It _______________ rain later.
a. has to b. need c. might

c) You ______________________ do it. I’ve already done it.
a. must not b. need not c. ought not

d) Although it contains many difficult words, I ___ read this book now.
a. can b. could c. may

e) Can you pronounce my name properly? I ___ if you would speak more slowly.
a) could b)may c)can

Answer:

a) must
b) might
c) need not
d) can
e) could

Bài 5:

1. Yesterday I ________ finish my geography project.

 must
 mustn’t
 had to

2. She will ________ wait in line like everyone else.

 must
 have to
 has to

3. All employees ________ on time for work.

 must be
 mustn’t
 have to

4. We ________ forget to take the chicken out of the freezer.

 have to not
 must
 mustn’t

5. If you are under 13 you _____ to get your parents’ permission.

 have
 must
 musn’t

6. Your daughter may ________ try on a few different sizes.

 have to
 had to
 must

7. The doctor _____ get here as soon as he can.

 must
 mustn’t
 have to

8. Do you _____ work next weekend?

 have to
 must
 mustn’t

9. Bicyclists _____ remember to signal when they turn.

 mustn’t
 must
 has to

10. Angela, you _____ leave your clothes all over the floor like this.

 mustn’t
 must
 have to
Answer:
1. had to
2. have to
3. must be
4. mustn’t
5. have
6. have to
7. must
8. have to
9. must
10. mustn’t

Bài 6:

1. It’s raining outside. Tim  take his umbrella.

2. I can give you my car, so you  buy a new one.

3. They  be in a hurry, because they have got more than
enough time.

4. You  stop at the red light.

5. Tomorrow is Sunday. You  get up very early.

6. Mrs. Parks can’t see very well. She  wear glasses.

7. You  return them. They are too small for you.

8. I am broke, I  borrow some money to buy a car.

9. You  stop smoking. It is very harmful.

10. Mr. Dickson is travelling abroad this summer, so he  get his passport soon.

11. All the students  obey the school rules.

12. It’s freezing outside, so we  take a cab and not walk.

13. Students  look at their notes during the test.

14. I have a terrible headache, so I  leave early.

15. Snow has blocked the roads. We  stay here until it’s cleared.

Answer:
1. must
2. don’t have to
3. don’t have to
4. must
5. don’t have to
6. must
7. must
8. have to
9. must
10. has to
11. have to
12. must
13. mustn’t
14. must
15. have to

Bài tập bổ sung MUST vs HAVE TO 

Exercise 1: Choose the correct answer for each question. 

1 We have to/don’t have to/must buy a ticket when we arrive because we paid on the internet. 

2 You can’t leave your bag here. You have to/can/mustn’t keep it with you. 

3 You have to/don’t have to/mustn’t take photos of the artworks, but you can buy a postcard in the gift shop. 

4 You must/don’t have to/mustn’t make an appointment to see the nurse. Just knock on the door. 

5 I have to/must/mustn’t help you with your test. You must do it by yourself. 

Exercise 2: Choose the correct answer. 

  1. Look out for signs that you……..go into a particular area.

A must B don’t have to C mustn’t 

  1. You can camp overnight in the park, but you……….keep your food in a special box so it doesn’t attract bears.

A mustn’t B don’t have to C have to 

  1. You………..carry bear spray but it is a good idea.

A must B have to C don’t have to 

  1. Don’t get too close to any wild animals. You………..stay 100 meters away from bears.

A must B mustn’t C don’t have to 

  1. If a bear comes towards you, you………run away.

A mustn’t B have to C must 

Exercise 3: Fill in the blanks with a correct word in the box. 

mustn’t                don’t have to          must               have to                must 

 

1 We …….finish this geography project until next Friday, so we’ve got lots of time. 

2 You ………touch that dog – he can be dangerous if he doesn’t know you. 

3 We ………go through the park before 9.30 p.m. because it closes at night. 

4 You ……bring some strong shoes because we’re going hiking across the hills on Sunday! 

5 I hate that moment when the teacher says: ‘You can turn over your exam papers now.’ And then the moment when he says: ‘You …… stop writing now.’ 

Key: 

  1. don’t have to
  2. mustn’t
  3. have to/must
  4. have to/must
  5. have to/must

Exercise 4: Complete the conversation with these verbs. You do not need two of the verbs. 

can anyone           can’t you            do you have to           does he have to     

don’t have to           has to           have to          mustn’t              you must 

 

A: This is Monty, my pet snake. You can hold him if you like. 

B:Er, maybe not! How often 1 …………. feed him? 

A: He only 2  …………. have food once a week. You 3  ………….  feed snakes too often because it makes them ill. 

B: And 4  …………. have special food? 

A: No. Any kind of meat is fine. 

B: And what does the law say? 5  …………. have a pet snake or do you need a licence? 

A: No, you 6  …………. have a licence for most snakes. You only 7  ………….  have a licence for dangerous wild animals, like lions and wolves. 

B: Wow! But who would want to keep one of those? 

Key 

1 do you have to 

2 has to 

3 mustn’t 

4 does he have to 

5 Can anyone 

6 don’t have to 

7 have to 

Exercise 5: Complete the park rules with the correct form of must, have to, mustn’t, don’t have to. For some rules there may be more than one possible answer. 

PARK RULES 

1 You can use this park during the week from 8.30 a.m. to 7.30 p.m but you ……use it after 7.30pm. 

2 At the weekend it closes later but you ……….. enter after 9.30 p.m. 

3 Users of the park can sit on the grass or the benches but ……….walk through the bushes or flowerbeds. 

4 You ……….. keep dogs on a lead. 

5 You ……… use the rubbish bins or take your litter away with you. 

6 Entry to the park is free and also you ………. pay for parking during the week. 

Key 

1 mustn’t 

2 must/have to 

3 mustn’t 

4 have to/must 

5 have to/must 

6 don’t have to 

Bài tập phân biệt “must” và “have to” này có đáp ứng được nhu cầu của bạn không? Hãy theo dõi Edison Schools để có thêm nhiều kiến thức hữu ích như này nhé!

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