"Been" 是 过去时的动词形式，具体来说是 be动词的过去分词。它用于表示过去某个时间里发生的动作或存在的状态。例如：
1. She has been studying for hours.
2. They have been traveling all day.
3. I have been feeling tired lately.
此外，"been" 也可以用作现在完成时的助动词，与"have"或"has"一起构成现在完成时态，表示从过去某一时间点开始一直持续到现在的动作或状态，例如：
1. They have been working on the project since last year.
2. I have been meaning to call you.
建议在使用"been"时，根据具体的语境选择合适的时态，以确保准确表达意图。