Inverted Conditionals
1Công thức
Should + subject + base verb; Were + subject (+ to-infinitive); Had + subject + past participle2Giải thích
Đảo ngữ trong câu điều kiện là cách diễn đạt trang trọng thay if bằng Should, Were hoặc Had đứng đầu câu: Should + S + V, Were + S ..., Had + S + V3. Phủ định đặt not sau chủ ngữ.
A formal way to form conditional sentences by inverting the subject and auxiliary instead of using if. Should replaces if ... should, were replaces if ... were, and had replaces if ... had.
Dấu hiệu: shouldwerehad
3Khi nào dùng
- Formal version of the first conditional (Should ...)
- Formal version of the second conditional (Were ...)
- Formal version of the third conditional (Had ...)
4Quy tắc cần nhớ
- Inversion is used in writing and formal speech
- The negative is formed with not after the subject: Had they not left ...
- A comma usually separates the if-clause from the result when it comes first
5Ví dụ
Should you require further information, please contact reception.
Were I in your position, I would accept the offer.
Had we known about the delay, we would have booked another flight.
6Lỗi thường gặp
- Had you would have asked, I would have told you. (Had you asked)
- Should you will need help, call me. (Should you need help)