tough on somebody
tough with somebody

I've decided I'm going to have to be tough with you.

But officials are ready to get tough with those who resist.

"We need to tell the men that it will get tougher with each town."

When the going gets tough with your studies, having goals will help to see you through.

They were both tough - with a right to be.

I hope we need not get too tough with them.

I know enough about cops not to get tough with them.

"Or else the federal government will get very tough with you."

He had to be a little tough with the guy.

"Local pressure got pretty tough, with folks thinking like this guy was family."