( He ( ( grabs ( at ( the ( wheel ( to ( turn ( the car ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP He)) (VP (VBZ grabs) (PP (IN at) (NP (DT the) (NN wheel) (S (VP (TO to) (VP (VB turn) (NP (DT the) (NN car)))))))) (. .)))
He grabs at the wheel to turn the car.
(ROOT (S (NP (DT The) (NN turning) (NN driveshaft)) (VP (VBZ causes) (NP (NP (DT the) (NNS wheels)) (PP (IN of) (NP (DT the) (NN car) (S (VP (TO to) (VP (VB turn)))))))) (. .)))
The turning driveshaft causes the wheels of the car to turn.