Seat belt is a noun, when the words are used together to describe the common automobile safety feature.
Seats can be either a plural noun or a present-tense verb:
The theater has reclining seats.
We can all go in my van: it seats eight.
The word seated is a verb. It is the past tense and past participle of the verb "seat".
Seat belt is a noun, when the words are used together to describe the common automobile safety feature.
Gradually is an adverb. In the sentence, "The girl gradually walked to her seat," gradually is an adverb because it demonstrates how or to what extent the girl walks to her seat.
It could be used as a noun -- one seat, two or more seats, or it could be a verb, as in "This restaurant seats 100".
part of speech
The part of speech for this particular word is a noun.
what part of speech is beneath
what part of speech is work
adverb
the part of speech sashay is a averb
Did is a verb, and not is an adverb. Didn't is not any part of speech. It's a contraction of did and not.
The word speech is a noun.
Adjective