The train from Montreal arrived four hours late.
The intransitive verb "arrived" takes no direct object, and the noun phrase "four hours late" acts as an adverb describing when the train arrived.
Since the company was pleasant and the coffee both plentiful and good, we lingered in the restaurant for several hours.
The verb "lingered" is used intransitively and takes no direct object. The prepositional phrase "in the restaurant for several hours" acts as an adverb modifying "lingered."
The painting was hung on the south wall of the reception room.
The compound verb "was hung" is used intransitively and the sentence has no direct object. The prepositional phrase "on the south wall of the reception room" acts as a adverb describing where the paint hung.