4

1. I a lot of homework yesterday evening. 
=> I did a lot of homework yesterday evening. 
2. Mary Tom bought many books yesterday.
=>Mary and Tom bought many books yesterday.   
3. We are speaking writing English now.
=>We are speaking and writing English now.
4. I am thin. I am strong.
 
=> I am thin but strong.
 
5. Minh is very hard-working. He usually gets good grades on exams.
=>Minh is hard-working, so he usually gets good grades on exams
  =>Minh is hard-working; therefore, he usually gets good grades on

4
 

1. I did a lot of homework yesterday evening. 
S V 
2. Mary and Tom  bought many books yesterday.   
S
V 
 
3. We are speaking and writing English now.

S
V(chia theo thì ) 
 4. I am thin but strong.
S be 
5. Minh is hard-working, so he usually gets good grades on exam
.
S 
be
S
V
Minh
is
hard-working,
so
he
usually
gets
good
grades
on
exam.
 
Minh is hard-working; therefore, he usually gets good grades on exams

I. A simple sentence:
I did a lot of homework yesterday evening. 
S V

S

+

V(chính -chia theo thì)
to be

+ O
N/adj

=>Câu đơn là câu chỉ có 1 mệnh đề độc lập, gồm có 1 chủ ngữ và 1 động từ .

*NOTE:
- Mary and Tom are playing tennis.

Câu có thể có chủ ngữ là 2 danh từ/đại từ nối bằng 'and' nhưng vẫn
là 1 câu đơn
-

- We are speaking and writing English now.

- I am thin but strong.
-Trong 1 câu đơn chúng ta có thể nối 2 ý với nhau bằng 1 liên từ.
(chúng ta lược bớt chủ ngữ giống nhau để tránh lặp từ)

II.A compound sentence:
Minh is hard-working, so he usually gets good grades on exams
S V
S
V

 Minh is hard-working; therefore, he usually gets good grades on exams.

*Form:

=> S + V + O + , + từ nối + S + V + O
mệnh đề 1
mệnh đề 2

=>Câu ghép là câu có 2 hay nhiều mệnh đề độc lập về ý nghĩa, được

kết nối với nhau bởi một từ nối:
- and, or ,but ,so , for= because => liên từ kết hợp
- therefore, however, otherwise... => trạng từ liên kết (./,/;....,)
Nếu không thì

Practice:

1 Choose the correct answer A, B, C or D.

1. Parents should give teens some freedom,______ they should also set
limits.
A. but
B. so
C. or
D.for
2. My friend likes showing off her new things;________, she often
posts pictures on social media.
A. so
B. therefore
C. however
D. otherwise
3. She wanted to prepare for the exam ;______,she didn't turn off her
mobile phone.
A.but
B. for
C. and
D. however
4. Students don't cheat on exams, ______ it is a wrong thing to do.
A. for
B. or C. because
D. A and C are correct

PRACTICE

1

5. You should go home quickly; _______,  it will rain.
A. however B. otherwise C. therefore D.although
6. Schoolwork causes teens a lot of pressure, ______ they also feel
pressure from their parents.
A. so B. but
C. or
D. and

PRACTICE

2

Combine the two sentences to make compound sentences,
using the words in brackets .

1. I'm going to bed early tonight. I'm tired. (so)
2. Don't comment on her new hairstyle. She is very sensitive.(therefore)
3. The students have to study harder. The students may fail the exam.
(otherwise)
4. Students can work in groups. Students can work in pairs. (or)

2

Combine the two sentences to make compound sentences, using
the words from the box.

1. I'm going to bed early tonight. I'm tired. (so)
=>I'm tired so I'm going to bed early tonight.
2. Don't comment on her new hairstyle. She is very sensitive.(therefore)
=>She is very sensitive; therefore, don't comment on her new
hairstyle.  

2

PRACTICE

3. The students have to study harder. The students may fail the exam.
(otherwise)
=>The students have to study harder ; otherwise, The students may fail
the exam.
4. Students can work in groups. Students can work in pairs. (or)
=>Students can work in groups, or they can work in pairs.   

KEY:
1. I'm going to bed early tonight. I'm tired. (so)
=>I'm tired so I'm going to bed early tonight.
2. Don't comment on her new hairstyle. She is ery sensitive.(therefore)
=>She is very sensitive; therefore, don't comment on her new hairstyle
3. The students have to study harder. The students may fail the exam. (otherwise)
=>The students have to study harder ; otherwise, The students may fail the exam.
4. Students can work in groups. Students can work in pairs. (or)
=>Students can work in groups, or they can work in pairs.

PRODUCTION

GAME: SENTENCE RACE
Which group has the most sentences?

Work in groups. Each group makes as many compound sentences as
possible. The group with the most correct sentence is the winner.

CONSOLIDATION

1 Wrap-up
 Say out loud the connectors (coordinating
conjunctions and conjunctive adverbs) you have
learned in the lesson.  
 Talk about the meanings of the connectors and how
to use commas and semicolons with connectors.  

HOMEWORK
- Do exercise in the workbook:Unit 3 B4,5
- Make 5 simple and 5 compound sentences
- Prepare : unit 3 –lesson 4: Communication

1. He loves to travel. He doesn't like going by plane. (however)
2. Mi doesn't connect well with others. she wants to have more friends (but)

3.I have a headache. I'm going to take some medicine. (therefore)
4. Nam can't afford it right now. He wants to buy a car.(but)

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PRACTICE 1 Write S for simple sentences and C for compound
sentences.

____
S 1. Teenagers are often very active and talkative.

S 2. He often chats with his friends on Facebook Messenger.
____
____
C 3. She is a smart student, and she is an active member of our club.

C 4. My mother is cooking and she wants me to help her.
____

S 5. Teens need good friends and tolerant teachers at school.
____

C 6. He is a club member, but he never participates in any of the
____
activities.

S

7. Sports activities at school help me relax.

1. I did a lot of homework yesterday evening. 
S V
2. Mary and Tom  are playing tennis.
S
V
3. We are speaking and writing English now.
S
V
4. I am thin but strong.
S V(BE)
5. Minh is hard-working, so he usually gets good grades on exam
Minh is hard-working; therefore, he usually gets good grades on exams.
S V
S
V

PRACTICE 2

Combine the two sentences to make compound
sentences, using the words in brackets .

1. I'm going to bed early tonight. I'm tired. (so)
2. Don't comment on her new hairstyle. She is very sensitive.(therefore)
3. He loves to travel. He doesn't like going by plane. (however)
4. The students have to study harder. The students may fail the exam.
(otherwise)
5. Students can work in groups. Students can work in pairs. (or)
6. Mi doesn't connect well with others. she wants to have more friends (but)