Uint 10- li thuyet và bài tập

UNIT 10
Imperatives: Câu mệnh lệnh
Form:
+) Dạng khẳng định
e.g: Open your book!/ Come in!
Verb + O/ Pre.


+) Dạng phủ định:
e.g: Don’t go out!/ Don’t sit there!/ Don’t smoke here!
Don’t + Verb + O/ Pre.


Use:
Câu mệnh lệnh được dùng để ra lệnh cho ai đó phải làm gì hoặc không được làm gì. Hoặc đưa ra lời hướng dẫn.
e.g: Open the window./ Don’t turn off the light!
- Chủ ngữ câu mệnh lệnh ngầm hiểu là ‘ you’
e.g: (You) open the window!
- Thêm ‘ please’ cuối câu để tăng tính lịch sự.
e.g: Open the window please!
II. Must/ mustn’t:
Động từ khuyết thiếu must (phải) được dùng để đưa ra một mệnh lệnh, sự cấm đoán.
e.g: You must finish your homework before going to bed.
He must arive here on time.
Khi phủ định chúng ta chỉ cần thêm ‘not’ sau động từ ‘ must’. Có thể viết tắt là ‘ mustn’t’.
e.g: You mustn’t play with fire.
He mustn’t to be late.
Why- becase:
Câu hỏi Why thường được dùng để hỏi lí do hay nguyên nhân.
e.g: Why is he going to the library this afternoon?
Why did they borrow this book?
Why doesn’t she buy herself a bag?
Why + Va/ do + S + Vm + O/ A

Va: auxiliary verb: trợ động từ
Vm : main verb : động từ chính
Để trả lời cho câu hỏi với WHY, chúng ta có thể dùng:
Because + clause (mệnh đề)
e.g: Why are you on the diet? – Because I want to lose weight.
Why does he study hard? – Because he want to pass the exams
Infinitive phrase”
e.g: Why are you on the diet? – To lose weight.
Why do people do exercises? – To keep healthy.



Ex1: Complete the imperatives with these verbs:
Put chew Don’t make Close Take Don’t smoke Read Don’t touch


………………………….noise here!
……………. Off your shoes outside, please!
……………………… a little salt in the vegetables!
…………………….. the door, please!
…………………….before swallow!
……………………… in the bus!
……………………..this animal!
………………........the book out loud!
Ex 2: What do you say in these situations?
The class is very noisy when the teacher away for a few minutes.
You say:……………………………………………………………………………………………….
Nam watches too much television but doesn’t play any sports.
You say:………………………………………………………………………………………………
The examinations are coming, but your classmate, Hung, doesn’t study hard enough.
You say:………………………………………………………………………………………………
The pool is very deep, and it also has rocks.
You say:………………………………………………………………………………………………
Teasing wild animals is very dangerous.
You say:………………………………………………………………………………………………
Ex 3: Complete the sentences with Must or Mustn’t
She is ill, so she ……………see the doctor.
It is raining. You………………… take your umbrella.
You………………..throw litter on the stairs.
This is a secret. You ……………. tell any body.
You ………………. Make noise in the library.
We …………… hungry or we will miss the bus
You ……………….. eat fruit and vegetables.
The baby is sleeping. You ………………… shout.
You ……………be friendly to every body.
You …………………….. walk on the grass.
Ex 4: True or False.

T
F

You must wash your hands before meals



You mustn’t listen to your parents



You must break the window at school



You must take a shower everyday.



You mustn’t eat fruit and vegetables every day.



You must eat a lot of sweets if you want to lose some weight



You must tidy you room every day.



You must talk in class when the teacher is teaching




Ex 5: Make rules in our class with Must/ mustn’t:
In our class, we …………………….. study hard.
In our class, we …………………….. obey our teachers.
In our class, we …………………….. chat with other.
In our class, we …………………….. we use mobiphone.
In our class, we ……………………..help other classmates
In our class, we ……………………..say bad words.
Ex 6: Match the sentences in column A with the sentences in column B. Then write full sentences by using Because.
A

B

I am very hungry now
1.
a. he brushes them three times a day

He has strong with teeth.
2.
b. he is having a toothache

We wash our