1. But for your timely warning, we would have been unaware of the danger

--> if it

2. I used the dictionary application in my iPhone; otherwise, it would have taken me longer time to look up for this word.

--> Had

--> Without

3. If my car was working, I could drive you to the station

--> Because

4. Tell him that the meeting has been postponed if you meet John.

--> Should

5. We would need a bigger house if we had kids.

--> Were

6. My sister and I must be back before 10 o'clock; otherwise, my dad will be angry.

-->If

7. Her boy friend pays her tuition fee; otherwise, she wouldn't be able to go to university.

--> But for

8. I have a good friend Miguel. Without her, we wouldn't know what to do now.

-->Were

9.(Notice in a lift) In case of breakdown, please press the alarm button and call this number.

-> If and when

19. If they hadn't assisted us with finance, we would have gone bankrupt.

-> Without

With a nice large park in the city, every citizen there could enjoy the fresh air.

-->if

1, If it had not been for your timely warning, we would have been unaware of the danger.

- But for + N -> If it had not been for + N (nếu không có) -> Dùng trong câu điều kiện loại 2, 3 (không có thật ở hiện tại, quá khứ)

2, 

-> Had I not used the dictionary application in my iPhone, it would have taken me longer time to look up for this word.

- otherwise (adv) : nếu không thì -> Dấu hiệu phải đổi thể mệnh đề điều kiện

- Đảo ngữ CĐK loại 3 : Had + S + (not) + PII, S + would have + PII

-> Without using the dictionary application in my iPhone, it would have taken me longer time to look up for this word.

- Without = But for -> Without + N/ V-ing

3, Because my car isn't working, I can't drive you to the station.

- Đề đang là CĐK loại 2 nên viết lại với tình huống ở hiện tại (HTTD, can't)

- Because : bởi vì -> Chỉ nguyên nhân

4, Should you meet John, tell him that the meeting has been postponed.

- Đảo ngữ CĐK loại 1 : Should + S + V-inf, S + will + V-inf (hoặc : V + O - dạng biến thể)

5, Were we to have kids, we  would need a bigger house.

- Đảo ngữ CĐK loại 2 : Were + S + to V, S + would + V-inf

6, If my sister and I aren't back before 10 o'clock, my dad will be angry.

- CĐK loại 1 (có thật ở hiện tại, tương lai) : If + S + am/is/are (not), S + will + V-inf

7, But for her boy friend's payment of her tuition fee, she wouldn't be able to go to university.

8, Were I not to have a good friend Miguel, we wouldn't know what to do now.

9, If and when there is a breakdown, please press the alarm button and call this number.

- CĐK loại 1

10, Without their financial assistance, we would have gone bankrupt.

11, If there hadn't been a nice large park in the city, every citizen there couldn't have enjoyed the fresh air.

- CĐK loại 3