Cách sử dụng
"If only" is an expression that we use when we want to express a wish, but we know that it is impossible or unlikely to happen. It is often used in regretful or disappointed situations. For example, "if only I had studied harder, I would have passed the exam" or "if only I had more money, I could travel the world." We use it to express something we would like to change in the past or present, but now it is too late. It is an expression that can be used in both formal and informal situations.