I never dreamed that such a thing could happen!

我从没想到这种事竟会发生!

You were obviously annoyed that the child had happened along.

那孩子突然地出现你显然很生气。

I wondered uneasily if anything had happened to the children.

我忐忑不安地揣测孩子们是不是出了什么事。

It’s theoretically possible, but highly unlikely ever to happen.

这从理论说是有可能的，但是不会发生。

God forbid that this should happen to anyone ever again.

不容这类事人身重演。

Conventional wisdom has it that riots only ever happen in big cities.

按常理来说，只有大城市才会发生暴乱。

He told me briefly what had happened.

他扼要地告诉我所发生的事情。

What happened to that woman in afterlife?

那女人后半生的生活怎样？

All agog to know what had happened.

大家都急于知道发生了什么事情。

This happened in the center of operations.

这事发生演习的过程中。

He jogged out to see what happened.

他慢吞吞地走出去看外边发生了什么事。

We happened to be in the neighbourhood.

我们恰好是邻居。

The story happened on that particular day.

故事就发生那一天。

A bad accident happened to that family.

那个家庭发生了不幸的事情。

It happened in the depth of winter.

那事发生隆冬。

They rushed to see what was happening.

他们冲出去看发生了什么事。

There is no saying what may happen.

简直不知今后情况会怎么样。

He was oblivious of what was happening.

他已经忘却发生什么事了。

The climax of the book happens in Egypt.

该故事的高潮发生埃及。

The accident happened chiefly because you were careless.

发生事故的主要原因是你不小心。