Was happened

除上述意思和用法外，happen 和occur 還分別有一句型是值得學習的，那就是happen to do sth. (碰巧…；恰好…) 和it occurs to sb. that (想到；想起)。

= What occurred? 但這用於每天會發生的對話中會太正式，因此用happen會比較好。 ex. It all happened so fast ...

都可以表示“碰巧”，它们在意思上没什么区别，在用法上，as it happens 可用于句首或句末。如： As it happens, I have my notebook with me. 碰...