The parts of this machine are severely worn.

These shoes wear out quickly because I use them every day.

The parts of this machine are severely worn and need to be replaced.

If you use them every day, shoes wear out quickly.

It's difficult to find the blind spot of that problem.

Please tell me that story once again.

He was wearing a hat made of felt.

He was as quiet as the dead.

He is suffering from the symptoms of black hairy tongue.

He is traveling around the world as an ecologist.