碰巧有个人从此经过这句话用英语怎么说

多种说法：

用进行时态或进行式表示正经过：
Someone was passing by here by chance.
Someone was passing by at it happened.
Someone happened to be passing by here.
用过去时态表示经过了：
It so happened that sone one was passing by.
Someone passed by as luck would have it.
It chanced that someone passed by.

someone happened to pass by.

just somebody away