单词：have been there
全都知道, 直接了解, 亲眼看到
have been there的用法和样例：
例句
- I have been there once or twice.我到过那里几次。
- We went there a couple of years ago.我们几年前去过那里。
- I have myself seen a striking instance.我曾亲眼看到过这样动人的例子。
- You haven't lived to see everything you've worked for fall apart.你还没有亲眼看到过你毕生经营的事遭到失败呢。