It can be an adverb, and also an adjective. It can also rarely be a noun. (The form "downstair" is seldom used.)
yes
Correction: No. "Downstairs" is a locational complement to a verb. Rather than modifying a verb, as an adverb would do, "downstairs" completes the meaning of a verb (as a direct object would).
The adverb in that sentence is downstairs. It's an adverb of place and tells where you ran.
Does is a verb, not an adverb.
Adverb
It can be an adverb or an adjective.
The adverb is highly
"Downstairs" can be an adverb, an adjective, or a noun: (as adverb) We went downstairs. (as adjective) This house has a downstairs bedroom. (as noun) The downstairs is flooded.
The adverb in that sentence is downstairs. It's an adverb of place and tells where you ran.
The adverb is "downstairs." It tells where the playroom was built.
downstairs
The adverb is "downstairs." *The clause "thinking the world was on fire" is an adverb clause using the participle thinking.
No, the word "downstairs" is not a preposition. It is an adverb that describes location or direction.
Downstairs is not a preposition but a noun. "It is the lower part of a building".
Yes. As in "I was downstairs getting ready for work when the phone rang."
Yes, adverbs of place tell where an action or status occurs. Examples are here, there, everywhere, anywhere, up, down, upward, downward, near, far, in, out, inside, outside, over, underneath, upstairs, and downstairs.
Bas in French is masculine as a noun for "bottom" or "stocking" or as an adjective for "low" even though it has no gender as an adverb for "down" or "downstairs."
the living room is downstairs.
Downstairs EP was created in 311.