He won in a lottery. Now he has to....
Now he has to GO TO THE BANK / INVEST HIS MONEY / BE CAREFUL...
He's a police officer. He has to...
He has to KNOW THE TRAFFIC REGULATIONS / CATCH CRIMINALS ...
He is a teacher. He has to...
He has to RUN FAST;)
He is a kitchen help. He has to....
He has to wash the dishes.