The parts of speech are important in understanding sentence structure.

She has played many bit parts in movies.

The nonmoving parts of the machine need to be replaced.

The machine has many moving parts.

The insect has specialized mouth-parts for feeding.

I need to order some spare parts for my car.

He is a man of parts.

The men of parts were highly skilled in their respective fields.

The sums of their parts are greater than the whole.

The parts interpreters are responsible for identifying and sourcing the necessary components for repairs.