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I/ LIÊN TỪ CHỈ KẾT QUẢ (result)

1. SO + adj/adv + THAT + clause
SUCH + noun + THAT + clause (trong văn nói có thể lược bỏ THAT)
Ex:
- He was SO tired THAT he went to bed early.
- It was SUCH a difficult exam (THAT) he knew he wouldn’t pass it.

2. SO + clause
Ex:
- It was late, SO he decided to take a taxi home.

3. AS A RESULT, CONSEQUENTLY có thể dùng để mở đầu câu.
AND, AS A RESULT được dùng để nối 2 mệnh đề trong một câu.
Ex:
- We have invested too much money in this project. CONSEQUENTLY, we are in financial difficulties.
- His wife left him, AND/AS A RESULT, he became very depressed.

4. THEREFORE thường được dùng ở giữa câu (ngoài ra cũng có thể dùng ở đầu hoặc cuối câu)
Ex:
- We feel, THEREFORE, that a decision must be made.

II/ LIÊN TỪ CHỈ LÝ DO (reason)

1. SINCE/AS/SEEING THAT + clause (đứng trước mệnh đề chính)
Ex:
- SEEING THAT/SINCE/AS we arrived late, all the best seats had been taken.

2. BECAUSE + clause (đứng sau mệnh đề chính)
Ex:
- We couldn’t find a good seat BECAUSE all the best ones had been taken.

3. BECAUSE OF/AS A RESULT OF/OWING TO/DUE TO + noun/noun phrase.
Ex:
- We were unable to go by train BECAUSE OF the rail strike.
- Many of the deaths of older people are DUE TO heart attacks.

III/ LIÊN TỪ CHỈ MỤC ĐÍCH (purpose)

1. (NOT) TO/IN ODER (NOT) TO/SO AS (NOT) TO + verb nguyên mẫu
Notice: trong văn viết (formal) không nên dùng (NOT) TO
Ex:
- We came to the countryside TO find some peace and quiet.
- Handle the flowers carefully IN ORDER NOT TO damage them.

2. SO THAT/IN ORDER THAT + clause (thường dùng can, could, might, would)
Ex:
- He chose this university SO THAT/IN ORDER THAT he could study Physics.

IV/ LIÊN TỪ CHỈ SỰ ĐỐI LẬP (contrast)

1. ALTHOUGH/EVEN IF/EVEN THOUGH + clause (even though chỉ dùng trong văn nói)
Ex:
- ALTHOUGH/EVEN IF/EVEN THOUGH the car is old, it is still reliable.

2. DESPITE/IN SPITE OF + noun/noun phrase/V_ing
DESPITE THE FACT THAT/IN SPITE OF THE FACT THAT + clause
Ex:
- DESPITE/IN SPITE OF the rain, I went for a walk.
- We enjoyed our walking holiday DESPITE THE FACT THAT/IN SPITE OF THE FACT THAT it was tiring.

3. HOWEVER + clause
THOUGH thường dùng trong văn nói, và đứng ở cuối câu.
Ex:
- Buying a house is expensive. It is, HOWEVER, a good investment.
- It’s a big decision to make, THOUGH.

4. BUT/WHILE/WHEREAS thường dùng để nối 2 mệnh đề trong câu.
Ex:
- John is very rich BUT/WHILE/WHEREAS his friends are extremely poor.

5. ON THE ONE HAND/ON THE OTHER HAND dùng cho một cặp câu diễn tả 2 ý trái ngược nhau.
Ex:
- ON THE ONE HAND these computers are expensive. ON THE OTHER HAND they are exactly what we want.

V/ LIÊN TỪ CHỈ THỜI GIAN

1. WHEN/WHILE/AS/AFTER + clause
Ex:
- WHEN/WHILE/AS I was driving along the road, I saw a terrible accident.
- He went out AFTER he’d finished work.

2. WHENEVER/EVERY TIME + clause
Ex:
- WHENEVER/EVERY TIME I see him, he’s driving a different car.

3. FIRST/THEN/LATER etc. dùng để giới thiệu những mốc thời gian.
Ex:
- FIRST he closed all the windows, THEN he locked the doors. LATER he came back to check that everything was all right.

4. DURING/ALL THROUGH/THROUGHOUT + noun phrase.
Ex:
- DURING/ALL THROUGH the summer we get a lot of visitors.
- It rained heavily THROUGHOUT the night.

VI/ LIÊN TỪ CHỈ ĐIỀU KIỆN (condition)

1. EVEN IF/AS LONG AS/UNLESS + clause
Ex:
- EVEN IF you are born rich, life is still difficult.
- You can borrow the car AS LONG AS you’re careful with it.
- You can’t come with me UNLESS you promise to keep quiet.

2. WHETHER… OR NOT được dùng làm câu hỏi gián tiếp.
Sau giới từ và/hoặc trước động từ TO V chúng ta sử dụng WHETHER chứ không dùng IF.
Ex:
- I don’t know WHETHER you have met him OR NOT.
- It depends ON WHETHER the government takes any action.
- The organizers will decide WHETHER TO IMPOSE fines.

3. IN CASE + clause
IN CASE OF + noun (dùng trong văn viết)
Ex:
- Take this umbrella IN CASE it rains.
- IN CASE OF emergency, break the glass.

VII/ LIÊN TỪ DÙNG ĐỂ THÊM THÔNG TIN HOẶC NHẤN MẠNH

1. BESIDES/IN ADDITION (TO THAT)/FURTHERMORE + clause (đứng sau mệnh đề chính). Trong văn viết nên dùng FURTHERMORE.
MOREOVER được dùng ở đầu hoặc giữa câu nhằm đưa thêm thông tin.
Ex:
- I don’t really want to go out tonight. BESIDES, there’s a good film on TV.
- We are still waiting for the goods we ordered three months ago. FURTHERMORE, we have been overcharged for our last order.
- This theory about the origins of the universe is new. It is, MOREOVER, extremely interesting.

2. NOT ONLY… BUT ALSO/AS WELL
Notice: BUT ALSO + noun/noun phrase; BUT + S + V + ALSO
NOT ONLY khi đứng đầu câu sẽ mang ý nghĩa nhấn mạnh, sử dụng cấu trúc này cần đảo ngữ cho vế NOT ONLY và vế còn lại sẽ dùng BUT + S + V + ALSO.
Ex:
- The painting is NOT ONLY valuable BUT ALSO a work of art.
- She NOT ONLY writes novels BUT (she) lectures AS WELL.
- The house was NOT ONLY large BUT (was/it was) ALSO modern.
- NOT ONLY is the restaurant superb BUT it is ALSO expensive.

3. AS WELL AS + noun/phrase/V_ing
Ex:
- They robbed a bank AS WELL AS a post office.
- AS WELL AS being sent to prison, they were fined $2000.

4. TOO/AS WELL/NOT EITHER thường dùng trong văn nói, và đặt ở cuối mệnh đề phụ.
Ex:
- They like Indian food. I like Indian food TOO/AS WELL.
- They aren’t very generous people. They have NOT got any friends EITHER.