I didn't buy it because I didn't have enough money. => If ______________________________.
I didn't buy it because I didn't have enough money.
=> If ______________________________.
Đáp án: If I had had enough money, I would have bought it.
Giải thích: Câu điều kiện loại 3 giả định không có thật ở quá khứ: If + S + had Vp2, S + would have Vp2
Dịch: Nếu tôi có tiền, tôi sẽ mua nó.