Let's try this:  Vuokrasin eilen auton. Ajoin autoa koko päivän. Tänään auton rengas puhkesi.  (I made this little tricky on purpose. Every sentence has one accusative.) In English somehting like: Yesterday I rented a car. I drove the car whole day. Today car's tire blew. My mistake. Last sentence DOES NOT have an accusative. :o