He points up to the sky.

She is pointing up at the sky.

He pulls up in front of the house.

He is pulling up the weeds in the garden.

He pulled up in front of the house.

She always snaps up the latest fashion trends.

She was snapping up all the good deals at the store.

He revs up the engine before starting the race.

He revved up the engine of his car.

I filled up the gas tank before the road trip.