Is an English adjective phrase an adjective plus a noun? Is there an adjective plus a preposition plus a noun

Is an English adjective phrase an adjective plus a noun? Is there an adjective plus a preposition plus a noun

Yes, if you say adjectives plus prepositions and nouns, please refer to Clause 5. 1. An adjective phrase is a phrase composed of several adjectives or adjectives and their modifiers. 2. Two or more adjectives can be connected by equivalent conjunctions such as and, but to form an adjective phrase. Your room is large and beautiful