She looked troubled.

I had trouble finding my keys this morning.

His behavior troubles us.

Dealing with difficult customers can be troubling.

When you find yourself in trouble, don't hesitate to ask for help.

I always get in trouble for being late to work.

I always seem to get into trouble.

I don't want to go to the trouble of cooking tonight.

If you keep provoking him, you're just asking for trouble.

I have trouble understanding this math problem.