find sb doing sth、be surprise to 意思，用法、造句

如：I found him playing the piano.我發現他正在彈鋼琴。

be surprise to 應該是be surprised to do sth.因為什麽而驚訝，不定式結構是表示原因的。如：

I was surprised to hear the news.聽到這消息，我很驚訝。