Bài giảng Tiếng Anh Lớp 12 - Unit 10: Endangred species - Lesson 5: Language focus

time. 
Show 
way. 
Look 
clock 
man 
think 
wants 
go 
mo 
not 
one 
want. 
arrived 
bus 
Why 
have 
Come 
swim 
think 
fine 
gone 
walk 
park 
won 
come 
back 
2. PRACTICE 
UNIT 10: ENDANGERED SPECIES 
LESSON 5: LANGUAGE FOCUS 
I. PRONUNCIATION 
II. GRAMMAR 
Revision: Modal verbs: May, Might, Must, Mustn’t, Needn’t 
1 . May/might+Inf . (Có lẽ, có thể) dùng để diễn ta sự suy đoán gần đúng 
Eg. 	He may be in his office (= Perhaps he is in his office) 
	He might be having lunch. (=Perhaps he is having lunch.) 
* May+Inf. Còn diễn tả một sự xin phép. Nhưng might+Inf có thể được dùng trong câu điều kiện loại 1. 
Eg. 	 May I go out? 
	If the weather is fine, we might go for a picnic. 
* May / might: được dùng để nói về một sự việc hoặc hành động có thể xảy ra trong tương lai: 
Eg. I’m not sure where to go for my holidays but I may go to Italy . (=Perhaps I’ll go) 
 The weather forecast is not very good. It might rain this afternoon. (=Perhaps it’ll rain) 
* Thể phủ định là May not hoặc might not (mightn’t ) 
* S + may / might + Verb ....= Perhaps + S + will + verb...... 
 	 = S + will + probably + verb.... 
	 = S + seem + to verb..... 
 = In all probability / likelihood + S + will + verb ....... 
 = It is (quite) likely that + S + will + verb ........ 
2. Must, Mustn’t, Needn’t + Infinitive: 
a. Must - Inf : cần thiết phải làm 
Eg : You haven’t got much time. You must hurry. 
b. Mustn’t - Inf : cần thiết do đó không được làm 
Eg : You can tell Tom what I said but he mustn’t tell anybody else. 
(= It is necessary that he doesn’t tell anybody else) 
c. Needn’t - Inf . : = don’t / doesn’t need to : Không cần >< must 
Eg : You have got plenty of time. You don’t need to hurry (You needn’t hurry) 
* Must+Inf. (phải chủ quan ) & have to - Inf. (phải khách quan). 
UNIT 10: ENDANGERED SPECIES 
LESSON 5: LANGUAGE FOCUS 
I. PRONUNCIATION 
II. GRAMMAR 
Revision: Modal verbs: May, Might, Must, Mustn’t, Needn’t 
III. EXERCISES 
Exercise 1 : Complete the sentences, using may/might with one of the verbs in the box. 
bite	break	need	 rain 	 slip	 wake 
1. Take an umbrella with you when you go out. It might rain later. 
2. Don’t make too much noise. You ______________ the baby up. 
3. Be careful of that dog. It ___________________ you. 
4. I don’t think we should throw that letter away. We ______________ it later 
5. Be careful. The footpath is icy. You ___________________ . 
6. I don’t want the children to play in this room. They _______________ something 
may/might need 
may/might wake 
may/might bite 
may/might slip 
may/might break 
Exercise 2 : Complete the sentences, using needn’t with one of the verbs in the box. 
ask	come	explain	 leave 	 tell	 walk 
1. We’ve got plenty of time. We needn’t leave yet. 
2. I can manage the shopping alone. You _______________ with me. 
3. We _______________ all the way home. We can get a taxi. 
4. Just help yourself if you’d like something to eat. You __________just 
5. We can keep this a secret between ourselves. We _________________ anybody else. 
6. I understand the situation perfectly. You _________________ further. 
needn’t ask 
needn’t come 
need’t walk 
needn’t tell 
needn’t explain 
Exercise 3 : Complete the sentences with must, mustn’t or needn’t 
1. We haven’t got much time. We must hurry. 
2. We’ve got plenty of time. We needn’t hurry. 
3. We have enough food at home so we ______ go shopping today. 
4. Jim gave me a letter to post. I ________ remember to post it. 
5. Jim gave me a letter to post. I _________ forget to post it. 
6. There’s plenty of time for you to make up your mind . You _________ decide now. 
7. You __________ wash those tomatoes. They’ve already been washed. 
8. This is a valuable book. You ___________ look after it carefully and you _________ lose it. 
mustn’t 
needn’t 
must 
needn’t 
needn’t 
must 
mustn’t 
1. It isn’t necessary for you to water these plants. 
 You nee