Verb
The green area on the western wing.
in - preposition the - article house - noun
The House is a proper noun. It describes a specific house.
"Haunted house" is a noun phrase.
Verb
An adverb.
"lay" is a verb and "down" is an adverb.
Noun because its an object
It is a pronoun.
"lay" is a verb and "down" is an adverb.
PREPOSITION
The word "house" meaning "a building" is a noun. The word "house" meaning "to put in a house" is a verb.