经过图书馆英语

对应的英语：You go by a library and then reach to the Green University.

I saw Xiaoming while I was going by the library. 经过图书馆那种状态在英语翻译中需要注意时态，用过去进行时，强调了那一刻看到了小明出现在图书馆。

I saw Xiao Ming when I went past the library.

汉译英:I saw Xiaoming when I went past the library.

I saw Li Ming when I passed the Library。