The funny thing is it never happened again after that.

奇怪的是从那以后这事再也没有发生过。

《牛津词典》

What happened, is anything wrong?

发生什么了，有什么问题吗？

《柯林斯英汉双解大词典》

His version of what happened is incorrect.

他对所发生的事情的说法不准确。

《牛津词典》

He says this is a very huge increase compared to what has happened in the past.

VOA: special.2009.06.03

What is happened is that it is spread to Parkistan and we had a gradual eliminationof many Pashtun tribes.

而是这些组织蔓延到了巴基斯坦,还有就是普试图人在逐渐减少。

普林斯顿公开课 - 国际座谈会课程节选

Because what has happened is that a lot of parents have had kids at such a young age

因为很多父母生孩子的时候还太年轻，

重要的是家庭教育 - SpeakingMax英语口语达人

Dr. AHMER: So they make a call to the American forces and say this is happened now.

NPR: Dozens of Iraqi Army Men Arrested in Killings

This is what happened in Germany after reunification and is still happening.

ECONOMIST: The Merkel memorandum

The rules of the road that allowed people to do what you just asked me and is alleged to have happened is as a result of the fact that the rules of the road put Wall Street in charge of Main Street.

WHITEHOUSE: Press Briefing