before you know it
中文释义
不知不觉中，很快。
Something will happen sooner than you expect.
常用搭配
- gone before you know it一转眼
- over before you know it转瞬即逝
- grown before you know it眨眼就长大
例句
- The kids grow up before you know it.孩子转眼就长大了。
- The quarter will be over before you know it.一个季度一晃就过去了。