Yes, it is an idiomatic form that can mean "nearly" or approximately.
"It cost close to a million dollars."
It is not a preposition because the amount already modifies the verb cost.
The adjective form is near (near by, or close). Adding -LY makes it an adverb, meaning "closely" or "almost."
NO!!! It is a superlative adjective. e.g. Dative ; close Comparative ; closer Superlattive ; closest . The house along the road is close to our house. The house , next but one, is closer to our house The adjacent house is the closest to our house.
It can be either. If the object is named, it is a preposition (near the wall). If there is no object, it just means "nearby" or "close." (Near can also be an adjective.)
Does is a verb, not an adverb.
Adverb
Close can be used as a noun, verb, adjective or adverb.Its use as an adverb is used in the sense of in a close manner or position,; tightly; nearly; densely secretly.Examples of close being used as an adverb are:a close relativea close frienda close shave
It is an adverb. It answers the question "where?" The 4 questions an adverb answers are: Where? When? How often? To what extent?
The adverb form of by means close by, or passing by, as in: "Let's run by." "The birds flew by"
It can be, informally, as in "He is doing fine." But this is very close to an adjective use. The formal adverb is "finely."
The adverb form of the adjective close is closely. It can refer to physical proximity or resemblance (closely spaced, closely related) or to careful attention (watched closely).
Closer is an adjective, the comparative form of "close"
adverb A+
adverb A+
The adjective form is near (near by, or close). Adding -LY makes it an adverb, meaning "closely" or "almost."
It is either. If it modifies a noun or pronoun, it is an adjective. "That was a close game." If it modifies a verb, an adjective, or an adverb, it is an adverb. The game finished closer than we thought."
Close! it's an adverb, but it's also an adjective as well.
No, "nearly" is not a preposition. It is an adverb used to indicate almost or close to a particular amount, distance, or time.