happen to do sth 碰巧做某事
what happened to you?你怎么了?
问别人怎么了 happen 后面一般都加介词to.
不做固定搭配时 happen in someplace 发生在某地.
做固定搭配时 happen in [美]偶然到...(来)
happen in with 偶然和...碰见
happen to do sth 碰巧做某事
what happened to you?你怎么了?
问别人怎么了 happen 后面一般都加介词to.
不做固定搭配时 happen in someplace 发生在某地.
做固定搭配时 happen in [美]偶然到...(来)
happen in with 偶然和...碰见