⇒ If I hadn't been for his encouragement, she wouldn't have decided to take part in the race.
Giải thích: Câu điều kiện loại 3:
If I hadn't been for N, S would/could/might (not) have Vpp.
= Had it not been for N, S would/could/might (not) have Vpp.
= But for/ Without/ Thanks to N, S would/could/might (not) have Vpp.