1. 
   I would love to be rich and famous.

   If only I were rich and famous.

2. 
   I'll only help you if you promise to try harder.

   Unless you promise to try harder, I won't help you.

3. 
   The flat is very noisy but they enjoy living there.

   Even though the flat is very noisy, they enjoy living there.

4. 
   I was drowning, but he helped me.

   If he hadn't helped me, I would have drowned.

5. 
   If it doesn't rain soon, millions of pounds' worth of crops will be lost.

   Unless it rains soon, millions of pounds' worth of crops will be lost.

6. 
   We got lost because we didn't have a map.

   If we had had a map, we wouldn't have gotten lost.

7. 
   Today is an awful day, so we can't go to the beach.

   If today weren't such an awful day, we could go to the beach.

8. 
   I was sick yesterday, so I didn't go to class.

   If I hadn't been sick yesterday, I would have gone to class.

9. 
   David has so many accidents because he's so clumsy.

   If David weren't so clumsy, he wouldn't have so many accidents.

10. 
    The office may be closed, so Mark won't be able to get in.

    If the office is closed, Mark won't be able to get in.

11. 
    You may want a chat, so just give me a ring.

    If you want a chat, just give me a ring.

12. 
    The airport was closed, so Sarah wasn't able to fly to Rome.

    If the airport hadn't been closed, Sarah would have been able to fly to Rome.

13. 
    I am having a lot of troubles now because I lost my passport last week.

    If I hadn't lost my passport last week, I wouldn't be having so many troubles now.

14. 
    Unless someone has a key, we can't get into the house.

    We can only get into the house if someone has a key.

15. 
    We stayed up late last night and we were so tired.

    If we had gone to bed early, we wouldn't have been so tired.

16. 
    He wasn't able to answer the questions, so he failed the exam.

    If he had been able to answer the questions, he wouldn't have failed the exam.

17. 
    You didn't tell me about it earlier, so I wasn't able to help you.

    If you had told me about it earlier, I would have been able to help you.

18. 
    He failed the exam because he lacked only one mark.

    If he had had only one more mark, he wouldn't have failed the exam.

19. 
    I couldn't drive to London because I repaired my car too late.

    If I hadn't repaired my car too late, I could have driven to London.

20. 
    She is ill. She doesn't remember your advice.

    If she weren't ill, she would remember your advice.

Phần VI:

1. I would love to be rich and famous.

   • Nếu muốn diễn tả mong ước không thực tế ở hiện tại, ta có thể dùng câu điều kiện loại 2:
     • If only I were rich and famous. (Giá mà tôi giàu có và nổi tiếng.)

2. I'll only help you if you promise to try harder.

   • Unless you promise to try harder, I won't help you. (Trừ khi bạn hứa cố gắng hơn, nếu không tôi sẽ không giúp bạn.)

3. The flat is very noisy but they enjoy living there.

   • Even though the flat is very noisy, they enjoy living there. (Mặc dù căn hộ rất ồn ào, nhưng họ vẫn thích sống ở đó.)

4. He was drowning, but he helped me.

   • If he hadn't helped me, I would have drowned. (Nếu anh ấy không giúp tôi, tôi đã bị chết đuối rồi.)

5. If it doesn't rain soon, millions of pounds' worth of crops will be lost.

   • Unless it rains soon, millions of pounds' worth of crops will be lost. (Trừ khi trời mưa sớm, nếu không hàng triệu bảng Anh tiền cây trồng sẽ bị mất.)  

6. We got lost because we didn't have a map.

   • If we had had a map, we wouldn't have got lost. (Nếu chúng tôi có bản đồ, chúng tôi đã không bị lạc.)

7. Today is an awful day, so we can't go to the beach.

   • If today weren't an awful day, we could go to the beach. (Nếu hôm nay không phải là một ngày tồi tệ, chúng ta có thể đi biển.)

8. I was sick yesterday, so I didn't go to class.

   • If I hadn't been sick yesterday, I would have gone to class. (Nếu tôi không bị ốm hôm qua, tôi đã đến lớp rồi.)

9. David has so many accidents because he's so clumsy.

   • If David weren't so clumsy, he wouldn't have so many accidents. (Nếu David không vụng về như vậy, anh ấy sẽ không gặp nhiều tai nạn như vậy.)

10. The office may be closed, so Mark won't be able to get in.

    • If the office is closed, Mark won't be able to get in. (Nếu văn phòng đóng cửa, Mark sẽ không vào được.)

11. You may want a chat, so just give me a ring.

    • If you want a chat, just give me a ring. (Nếu bạn muốn nói chuyện, cứ gọi cho tôi.)

12. The airport was closed, so Sarah wasn't able to fly to Rome.

    • If the airport hadn't been closed, Sarah would have been able to fly to Rome. (Nếu sân bay không bị đóng cửa, Sarah đã có thể bay đến Rome.)  

13. I am having a lot of troubles now because I lost my passport last week.

    • If I hadn't lost my passport last week, I wouldn't be having so many troubles now. (Nếu tôi đã không làm mất hộ chiếu tuần trước, thì bây giờ tôi sẽ không gặp nhiều rắc rối như vậy.)

14. Unless someone has a key, we can't get into the house.

    • We can only get into the house if someone has a key. (Chúng ta chỉ có thể vào nhà nếu ai đó có chìa khóa.)

15. We stayed up late last night and we were so tired.

    • If we hadn't stayed up late last night, we wouldn't have been so tired. (Nếu chúng ta đã đi ngủ sớm tối qua, chúng ta sẽ không mệt mỏi như vậy.)

16. He wasn't able to answer the questions, so he failed the exam.

    • If he had been able to answer the questions, he wouldn't have failed the exam. (Nếu anh ấy đã có thể trả lời các câu hỏi, anh ấy đã không trượt kỳ thi.)

17. You didn't told me about it earlier so I wasn't able to help you.

    • If you had told me about it earlier, I would have been able to help you. (Nếu bạn đã nói với tôi về điều đó sớm hơn, tôi đã có thể giúp bạn.)

18. He failed the exam because he lacked only one mark.

    • If he had had one more mark, he wouldn't have failed the exam. (Nếu anh ấy có thêm một điểm nữa, anh ấy đã không trượt kỳ thi.)

19. I couldn't drive to London because I repaired my car too late.

    • If I hadn't repaired my car too late, I could have driven to London. (Nếu tôi đã không sửa xe quá muộn, tôi đã có thể lái xe đến London.)

20. She is ill. She doesn't remember your advice.

    • If she weren't ill, she would remember your advice. (Nếu cô ấy không bị ốm, cô ấy sẽ nhớ lời khuyên của bạn.)