Explanation: A verb phrase is a syntactic unit consisting of an auxiliary verb preceding the main verb. A verb phrase can be the predicate of a sentence or a clause. In the given sentence: "Could you have forgotten your sunglasses in the car" the verb phrase is formed by the helping verbs "could have" and the main verb "forgot" in its past participle form "forgotten", we don't include "you" because it is the subject of the sentence.
The area of California in which we live is dry and arid, and yet we see grass growing in large areas around homes and office buildings. This practice is not only wasting water but is costing the city too much money—money that could be used for other projects.
