The sentence is not a preposition but, it does have a preposition in it: outside.
The term "outside" can be used as a preposition AND an adverb - depending on how the sentence is phrased.For example:I walked outside. (In this sentence, "outside" is an adverb because "I walked" can stand alone as an individual sentence.)Outside of the house, the winds roared. (In this case, "outside" is a preposition because the rest of the sentence cannot stand alone.)
There are no adverbs in this sentence. Mom = noun is = auxiliary verb waiting = gerund outside = preposition adverb for = preposition them = object pronoun. "outside" can be used as a preposition, but here it's an adverb
There is no preposition in that sentence. I is a pronoun, waited is a verb, and outside is an adverb.
Adverb
you can't! There is a beautiful fjord outside.
outside
Yes, it is a preposition. But it can be an adverb when used without an object (e.g. Go outside.)
It is a preposition if used with a noun to give a location. e.g. "She was standing outside the theater."
It can be either. Or also a preposition, or a noun. outside chance, outside wall - adjective stepped outside - adverb outside the lines - preposition the outside of the cup - noun
He is from outside town.
The craftsmanship in a boat was beautiful despite the fact that it was rusty on the outside.
with a key