Lesson 5b: Grammar – Page 71

Unit 5: Teenagers' Life

Unit 5: Teenagers' Life
Lesson 5b: Grammar
Page: 71

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Lesson 5b: Grammar – Page 71

Unit 5: Teenagers' Life

Lesson Outline
Warm-up
Vocabulary
Reading
Consolidation
Wrap-up
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Lesson 5b: Grammar – Page 71

Unit 5: Teenagers' Life

By the end of this lesson, students will be
able to...
-learn/practise modals.
- improve Ss' writing, collaboration, analytical
and critical thinking skills.
-ask for obligation, necessity and prohibitions.

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Lesson 5b: Grammar – Page 71

Unit 5: Teenagers' Life

WARM UP
Game:Kahoot!

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Lesson 5b: Grammar – Page 71

Unit 5: Teenagers' Life

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Lesson 5b: Grammar – Page 71

Unit 5: Teenagers' Life

Question 1: __________ do my homework on Sunday, please?
I want to go shopping now
A. Do have to

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B. Can I

C.Should I

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D.Must

Lesson 5b: Grammar – Page 71

Unit 5: Teenagers' Life

Question 2: You __________ copy from another student on a test. It's
against the rules.
A. haven't

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B. don't have to

C.couldn't

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D.mustn't

Lesson 5b: Grammar – Page 71

Unit 5: Teenagers' Life

Question 3: Because you're sitting an exam tomorrow,
you __________ go to bed early.
A. can

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B. could

C. should

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D.mustn't

Lesson 5b: Grammar – Page 71

Unit 5: Teenagers' Life

Question 4: Sylvia __________ present her ideas to the class
very clearly. She should be our speaker.
A. can

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B. must

C. should

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D. has to

Lesson 5b: Grammar – Page 71

Unit 5: Teenagers' Life

Question 5: We __________ do the test yesterday
because our teacher was off.

A. shouldn't

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B. can't

C. didn't have to

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D. mustn't

Lesson 5b: Grammar – Page 71

Unit 5: Teenagers' Life

Presentation

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Lesson 5b: Grammar – Page 71

Unit 5: Teenagers' Life

Really? I didn't have to
study because my class
is organising a sports
event today.

I had to study for my
exam yesterday.

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Lesson 5b: Grammar – Page 71

Unit 5: Teenagers' Life

We must respect our teachers.
(It's our obligation. We say so.)

Obligation/Necessity
must/have to/don't have to –
had to/didn't have to

We have to sit exams at our school.
(It's a rule. The headmaster says so.)

A teacher has to be caring to support
students. (It's necessary.)
They don't have to wear a uniform.
(It isn't necessary.)

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Lesson 5b: Grammar – Page 71

Unit 5: Teenagers' Life

We had to give some presentations last year.
(It was a rule. The teacher said so.)

Obligation/Necessity
must/have to/don't have to –

We had to study hard for exams last week.
(It was necessary.)

had to/didn't have to
I didn't have to do my homework yesterday.
(It wasn't necessary.)
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Lesson 5b: Grammar – Page 71

Unit 5: Teenagers' Life

You mustn't be late for school.
(It's against the rule.)

Prohibition

mustn't

We mustn't eat in class.
(It's against the rule.)

We mustn't forget our books.
(It's against the rule.)
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Lesson 5b: Grammar – Page 71

Unit 5: Teenagers' Life

Practice
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Lesson 5b: Grammar – Page 71

Unit 5: Teenagers' Life

Task 3 (SB, page 71): Choose the correct options.
1. Students have to/must fill in a form to join the music club.
It's a rule.
Explanation: It's a rule.
2. I must/mustn't improve my computer skills. I want to
become an IT technician in the future.
Explanation: It's necessary.
3.You don't have to/mustn't pick me up after school. I'm
getting a ride home with Susan's mum.
Explanation: It isn't necessary.
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Lesson 5b: Grammar – Page 71

Unit 5: Teenagers' Life

4. A: How was your weekend, Sally?
B: Nothing special. I have to/had to do research for my
presentation.
Explanation: It was necessary.
5. A: You don't have to/mustn't run in the school halls, children!
B: Sorry, Miss. We're late for our next class.
Explanation: It's against the rule.
6. A: How was your presentation yesterday?
B: I mustn't/didn't have to give my presentation because my
school organised a clean-up day.
Explanation: It wasn't necessary.
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Lesson 5b: Grammar – Page 71

Unit 5: Teenagers' Life

Task 4 (SB, page 71) : Choose the correct options.
1.You _____ study harder if you want to improve your English.
A. could
B.must
C. can
D. ha
to
2._____ your notes? I missed the class yesterday.
A. Must I borrow
B. Should I borrow C. Do I have to borrow D. Can I borrow
3. He _____ help me with the project because I knew what to do.
A. shouldn't
B. didn't have to C. doesn't have to
D. couldn't
4. Barry _____ read well when he was seven.
A. can
B. had to
C.could
D.should
5. My mum _____ wear a uniform when she was at school.
A.must
B. had to
C. can
D. should
6. We _____ take any books into the exam room. It's against the rule.
A. mustn't
B. don't have to
C. shouldn't
D. must
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Lesson 5b: Grammar – Page 71

Unit 5: Teenagers' Life

Exercise 2 (WB, page 41)

★★ Fill in each gap with mustn't, can, have to, had
to, could or couldn't.

mustn't
1. You _________
eat or drink in the computer room. It's against the rules.
2. _________
I go out after I finish my homework, Dad?
Can
couldn't do his homework yesterday because he left his book at
3. A: Alfie _______
school.
had to go back to get it.
B: I forgot mine, too, but I _______
4. A: Janie _________
read and write when she was just 4 years old.
could
Her parents taught her.
B: Really?
5. A: I'm going to the cinema. Do you want to come with me?
B: No, thank you. I ________
have to prepare for my presentation.
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Lesson 5b: Grammar – Page 71

Unit 5: Teenagers' Life

Exercise 3 (WB, page 41)

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Hi Jenny,
couldn't email you last night because
Sorry I (1) ___________
I (2) _________
had to study for my exams. It's really difficult!
can
I (3) ___________
solve maths problems easily, but I'm
not good at history and I know you are.
Can
(4) ___________
you help me, please? If you help me,
I'll do something for you. There's a food festival this
weekend. You (5) ___________
come with me – we'll
should
have a great time! Think about it. The good thing is
that I (6) _____________
don't have to study for the exams tonight
because Mum is taking me shopping.
Bye! Ruby.
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Lesson 5b: Grammar – Page 71

Unit 5: Teenagers' Life

Production
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Lesson 5b: Grammar – Page 71

Unit 5: Teenagers' Life

Task 5( SB, page 71). Ask and answer about your school
life using modals.
A: Can you run in the halls at school?
run in the halls.
B: No, we mustn't ___________________
A: Can you eat in the classroom?
B: No, we mustn't ___________________
eat in the classroom.

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Lesson 5b: Grammar – Page 71

Unit 5: Teenagers' Life

CONSOLIDATION

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Lesson 5b: Grammar – Page 71

Unit 5: Teenagers' Life

Today's lesson
Grammar
- learn/ practise modals for
obligation/ necessity.

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Lesson 5b: Grammar – Page 71

Unit 5: Teenagers' Life

Homework
-Do the exercises in the WB (page 41).
-Do the exercises in Tiếng Anh 8 Right
on! Notebook (page 45).
-Prepare for the next lesson. (Unit 5Vocabulary, page 72).

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Lesson
Lesson 5b: Grammar – Page
71 3

Unit 5: Teenagers' Life

Stay positive and have a nice day!
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