17 Unit 7: World Population (Dân Số Thế Giới) mới nhất



Tham khảo đáp án những phần sau:

 Reading Unit 7 Lớp 11 Trang 80

 Speaking Unit 7 Lớp 11 Trang 83

 Listening Unit 7 Lớp 11 Trang 84

 Writing Unit 7 Lớp 11 Trang 86

 Language Focus Unit 7 Lớp 11 Trang 86


1/ Conditional sentences.

Conditional sentences type 1.


– Câu điều kiện loại 1 diễn tả một điều kiện có thể xảy ra ở hiện tại hoặc tưomg lai.

Ex: I will stay at home if it rains.

If she has finished her work, she can go home. If father is sleeping, you can go out. 

– Câu điều kiện loại 1 với lời yêu cầu hay mệnh lệnh.

Ex: If you see Tom at the party tonight, tell him to phone me.

Don’t talk in class and the teacher won’t punish you.

– Câu điều kiện loại 1 với “should” trong mệnh đề If hàm ý nghi ngờ, không chắc chắn.

Ex: If anybody should come, please tell him to wait for me.

—> Should anybody come, please tell him to wait for me.

       (lược bỏ If)

Conditional sentences type 2. 


– Câu điều kiện loại 2 diễn tả:

1/ Một điều kiện trái với hiện tại hoặc không thể xảy ra trong tưomg lai. Ex: If I were you, I would accept his invitation.

She can’t speak Chinese. If she could speak Chinese, she would get the job.

2/ Một tưởng tượng hoặc ước mơ.

Ex: If I had more money, I would travel around the world.

If I were a flower, I would be a sunflower.

Conditional sentences type 3.


Câu điều kiện loại ba diễn tả một sự việc, một điều kiện không có thật trong quá khứ mà chỉ là sự hối tiếc, một ước muốn thuộc về quá khứ mà thôi. 

The driver wasn’t careful. He had an accident.

If the driver had been more careful, he wouldn’t have had the accident. Tom didn’t go to the party last night.

If he had gone to the party last night, he could have met the new manager.

* Ta có thể bỏ “If ’ nếu dùng hình thức đảo ngữ.

If I had known … -> Had I known …

If Tom had come … —> Had Tom come …

Other conditional sentences:

1. If you ring this summer, no one answers.

(The present simple is used in both clauses. This means that one thing always follows another automatically.)

2. If you need any help, just ask.

If you are tired, don’t drive.

(We can also use a present-tense verb and an imperative (base form).)

3. If I had taken an intensive course in English last term, I would he able to speak English better now.

If Jim were a practical young man, he would have taken that job offer.

(We can mix type 2 and type 3.)


1. Without + noun phrase = If + past subjunctive (past simple form, were for be)…

                                             If + past perfect…

Without electricity, our life would be very difficult.

(If there were no electricity, …)

Without your help, I wouldn 7 have been successful.

(If you hadn’t helped me, …)

2. But for + noun phrase = If + past perfect…

But for your help, I wouldn’t have been successful.

(If you hadn’ helped me, …)

3. Trong câu điều kiện loại 2 và loại 3, chúng ta có thể bỏ if và dùng dạng đảo ngữ.

If I were in your situation, … = Were I in your situation, …

If it had not been for your help, … = Had it not been for your help,…

2/ Conditional sentences in reported speech.

Câu điều kiện trong lời tường thuật.

<a> Conditonal sentences, type 1.


Khi tường thuật câu điều kiện loại 1, ta đổi thì của động từ theo quy tắc chuyển đổi câu tường thuật.

Ex: He said, “If I catch the plane I’ll be home by five”.

Reported -» He said that if he caught the plane he would be home by five.

“If you feel ill”, she said, “you’d better go to bed”.

Reported —> She said that if I felt ill I’d better /I should go to bed.

<b> Condition sentences, type 2 and type 3.

Khi tường thuật câu điều kiện loại 2 và loại 3, thì của động từ không đổi.

Ex: “If I had a permit I could get a job”, he said, (type 2)

Reported -» He said that if he had a permit he could get a job.

“If she had loved Tom”, he said, “she wouldn’t have left him”, (type 3)

Reported —» He said that if she had loved Tom she wouldn’t have left him.