He awkwardly tried to explain what had happened.

他尴尬地尝试解释发生了什么。

After hearing what had happened, he was also deeply moved.

听完这件事后，他也深受感动。

Officials refused to say what had happened.

官员拒绝透露发生了什么。

I couldn't help thinking about what had happened.

我不禁想起了发生的事情。

She tried to explain what had happened but he kept interrupting her.

她试图解释发生的事情，但他一直打断她。

My mind was full of what had happened the night before, and I wasn't concentrating.

我满脑子都是前一天晚上发生的事情，没有集中注意力。

She gave me her version of what had happened, but it would be interesting to hear his half/side of the story.

她给了我她对所发生的事情的看法，但听听他对事情的看法会很有趣。

Unfortunately, I wasn't able to read the e-mail in full, but as I understood, he wanted to apologize for what had happened between us many years ago.

不幸的是，我不能完整地阅读电子邮件，但据我所知，他想为我们多年前发生的事情道歉。

Tom alone knew what had happened.

只有汤姆知道发生了什么事。

All agog to know what had happened.

大家都急于知道发生了什么。