first one should mean

来源: 于 2011-08-31 19:43:35 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

I bought a ticket in order to see my friend play

我上面那篇应该是下面两个的区别：

1) I saw my friend play

2) I saw my friend playing

两个都可以，但有细微区别