I saw a woman walking (along) the road.

Adverb

Adjective

Preposition

Conjunction

I saw a woman walking (along) the road.
میں نے ایک عورت کو سڑک پر چلتے ہوئے دیکھا۔
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(along): Preposition
As a preposition, along means 'in a line next to something long and thin', e.g. a road, a path: