They are very useful. They modify and provide more information about the noun in a sentence.
No, into is a preposition. Phrases using into are almost always adverb phrases. There is a colloquial use as an adjective, as in "they are into gardening" (informal).
Yes like "He did that well while she did that badly."
An adjective (adjectival) phrase modifies nouns or pronouns. There are several types, including those based on an adjective (adjective and its adverbs), as well as adjective prepositional phrases, and infinitive phrases.
Adverb phrases modify the verb, adjective, or adverb of the sentence.
an adjective phrase is a prepositional phrase that describes a noun or a pronoun
No, "and" is not an adjective. The word "and" is a conjunction. It is used to connect words, phrases, or clauses.
Yes, prepositional phrases can function as either adjective phrases or adverb phrases in a sentence. An adjective phrase modifies a noun or pronoun, while an adverb phrase modifies a verb, adjective, or adverb.
The one where the adjective ends in -st or the one with "the most" in front of the adjective.
of energy
The word there is usually an adverb, referring to a location. It can be used as an adjective, especially in idiomatic phrases (all there, over there).
Prepositional phrases that begin with after are adverb phrases: e.g. "The nebula formed after a supernova" meaning the nebula formed afterward.
Generally it is a preposition. It usually forms adverbial phrases.