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
The part with words on it.
Used is a verb (past tense of use) and an adjective (a used car).
'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