Cách sử dụng
The expression "as it happens/happened" is used to introduce some surprising or unexpected fact that the speaker has just discovered or remembered. It's often used to add a new detail to a conversation or a story that the listener may not have known before. For example, "As it happens, I used to live in the same city as your grandmother," or "As it happened, I had met her before she became famous." Essentially, the phrase is used to provide additional context about a situation.