Bài giảng Tiếng Anh 11 - Unit 1: The generation gap, Lesson 1: Modal verb - Năm học 2022-2023 - Lớp 11A2 - Trường THPT Hoài Đức

Modal verb 
Saturday, September 10 th 2022 
Vocabulary 
CONTENTS 
Must, have to 
03 
Should, ought to 
02 
02 
Form : should/ought to + V(bare_infinitive) : nên làm gì 
We use “ should or ought to ” to give our opinion about something or advice to somebody. We can use “ ought to ” instead of “ should ” 
Ex: You should/ought to finish your homework before you go out 
But 
“Should” th ư ờng dùng khi chúng ta muốn biểu đạt quan điểm, ý kiến cá nhân 
Ex: I think you should see him 
Trong câu hỏi should đ ư ợc dùng nhiều h ơ n ought to 
Ex: what should I do if I have any problem? 
“Ought to” th ư ờng đ ư ợc dùng khi nói đến điều luật, nhiệm vụ và quy định 
Ex: They ought to follow the school’s policy or the will get expelled 
Form: Must, Have to + V(bare_inf): phải làm gì 
We use “must, have to” to express obligation or the need to do sth. We can use “have to” instead of “must” 
Ex: I must/have to go out now. 
But 
Must : mang tính chất cá nhân, diễn tả sự bắt buộc đến từ ng ư ời nói, cảm giác cá nhân minh. Ng ư ời nói thấy đó là điều cần thiết phải làm. 
Ex: I really must give up smoking 
Have to : không mang tc cá nhân, diễn tả sự bắt buọc từ yếu tố ngoại cảnh nh ư luật lệ, quy định 
Ex: you can’t turn right here. You have to turn left 
“Must” có thể dùng để nói về hiện tại và t ư ơng lai, không dùng “ must” ở quá khứ, thay vào đó ta sẽ dung “had to” ( have to dùng ở mọi thì) 
Ex: I must go to school tomorrow 
 I had to go to school yesterday. 
Mustn’t : không đ ư ợc làm gì đó (chỉ sự cấm đoán) 
Ex: You mustn’t tell the truth 
Don’t have to = don’t need to : không cần làm gì, không phải làm gì (nhưng bạn muốn làm thì có thể) 
Ex: you don’t have to get up early 
Exercise 1: Choose the best option in the bracket to complete the sentences. 
1. Yesterday I (must/ mustn't/ had to) finish my English project. 
2. He will (must/ have to/ has to) wait in line like everyone else. 
3. We (must be/ mustn't / have to) on time for work. 
4. We (have to not/ must/ mustn't) forget to take the chicken out of the freezer. 
5. If you are under 15, you (have/ must/ mustn't) to get your parents' permission. 
6. Your child may (have to/ had to/ must) try on a few different sizes. 
7. The doctor (must/ mustn't/ have to) get here as soon as he can. 
8. Do you (have to/ must/ mustn't) work next weekend? 
9. Bicyclists (mustn't/ must/ has to) remember to signal when they turn. 
10. Susan, you (mustn't/ must/ have to) leave your clothes all over the floor like this. 
Exercise 2: Choose the best answer (A, B, C or D) to complete the following sentences. 
1. You__________use your mobile phone in the exam. 
A . oughtn't to 	 B . mustn't	 C . don't have to 	 D . shouldn't 
2. My grandparents live in the suburb. Therefore, whenever we visit them, we__________a bus. 
A . must take	 B . should take	 C . have to be taken 	 D . have to take 
3. We__________smoke on the bus. 
A . mustn't	 B . can't	 C . needn't	 D . mightn't 
4. There are a lot of tickets left, so you__________pay for the tickets in advance. 
A . mustn't	 B . won't	 C . should	 D. don't have to 
5. We couldn't find a hotel room so we __________ sleep in the car.	 
might	 B. should	 C. had to	 D. could 
6. You'll __________ tell the police that your house was broken into.	 
A. should	 B. must	 C. have to	 D. had to 
Exercise 3: Choose the best option to complete the sentences. 
1. When we were at school we (ought to/ had to/ must) wear a uniform. 
2. You (don't have to/ mustn't/ ought not to) be an expert to use the basic functions of program. 
3. I (mustn't/ don't have to/ shouldn't) wear glasses. I still can see perfectly well. 
4. We went to bed right after dinner because we (had to/must/should) get up early the following day. 
5. We (must/ can't/ should to) go for a drink one day. 
6. You (hadn't to/ didn't have to/ shouldn't) take any money. I have enough for both of us. 
PART 02 
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PART 03 
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