have been there before

• 曾到过那里； 全都知道； 直接了解； 亲眼看到

have been there before的用法和样例：

例句

1. I have been there once or twice.
   我到过那里几次。
2. I have myself seen a striking instance.
   我曾亲眼看到过这样动人的例子。
3. 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。