Quite is an adverb; useful is an adjective.
The word "useful" is an adjective in the phrase "quite useful" as it describes the noun it is modifying.
as useful as " is conduction or what part of speech it is?
In America it is quite common to treat articles (the, a, an) as a part of speech.
The word "useful" is an adjective because it can describe/modify nouns.The part of speech that the word useful is, is an adjective.
Quite is an adverb; interesting is an adjective.
I believe it would be an adjective.
Conjunctions such and, but, & or.
"Teaches" is a verb. "Which" is a pronoun. which part of speech is become
Used is a verb (past tense of use) and an adjective (a used car).
The part with words on it.
'His' and 'he' are pronouns
not quite sure if you are talking about "and" or "is" so... "and" is a conjunction "is" is a preposition