The food was bad.

I didn't know that bad things could happen.

The badness of the situation was evident to everyone.

My boss is often bad-tempered in the morning.

There's been bad blood between them since the argument.

The company had to write off a significant amount of bad debt.

It's too bad that we missed the train.

If you leave the milk out for too long, it will go bad.

He is in a bad off situation.