句子大意是：你曾问我，我是否把我历险的所有情况都告诉你了。
句中 there was to know about my adventures 是定语从句。
把这个定语从句拆解出来，原句可以分成两句话：
You asked me once if I had told you everything.
There was everything to know about my adventures.
There be + 不定代词 + 不定式（作定语），这个句型再举几例：
There was always something to do.
（总有些事可以做。）
I think there is something to talk to you about.
（我觉得有些事要跟你说一下。）
No problem! There is nothing to worry about.
（没问题！不用担心。）
句中 there was to know about my adventures 是定语从句。
把这个定语从句拆解出来，原句可以分成两句话：
You asked me once if I had told you everything.
There was everything to know about my adventures.
There be + 不定代词 + 不定式（作定语），这个句型再举几例：
There was always something to do.
（总有些事可以做。）
I think there is something to talk to you about.
（我觉得有些事要跟你说一下。）
No problem! There is nothing to worry about.
（没问题！不用担心。）
