After doing something bad, his conscience was always uneasy.

他做了坏事后，心肝一直不安。

The eerie music foreshadows something bad is about to happen.

诡异的音乐预示着将要发生不好的事情。

The eerie music in the movie was foreshadowing something bad.

电影中的诡异音乐是某些不祥事件的预兆。

She had a premonition that something bad was going to happen.

她有一种预感，觉得会发生不好的事情。

My friend is such a worrywart; she always thinks something bad will happen.

我的朋友是个杞人忧天的人，她总是认为会有坏事发生。

Something bad has happened to him.

他身上发生一些坏事情。

A:Something bad is likely to happen.

可能有什么坏事要发生了。

Something bad happens on him recently.

最近在他身上发生了不好的事。

I'm worried that something bad happened.

我担心发生了什么不好的事情。

Nowadays the society exists something bad.

现在，社会上存在一些不良事物。