happen：v.(尤指偶然)发生，出现;(作为结果)出现，发生;碰巧;恰好

第三人称单数： happens现在分词： happening过去式： happened过去分词： happened

记忆技巧：happ〔= hap〕机会；运气 + en 使… → 使成为机会 → 发生

相关介绍

She gave us her version of what had happened that day.

她从她的角度向我们描述了那天发生的事情。

She gave us her version of what had happened that day.

她向我们描述了她认为那天发生的事情。

It's the best thing that has ever happened to me.

这是我所遇到的最好的事。

Accidents like this happen all the time.

此类事故经常发生。