Everyone in the plane was eager to arrive at the base camp. Identify the type of verbal phrase that has been underlined and its function in the sentence. infinitive; adjective infinitive; subject infinitive; object infinitive; adverb

I assume that the verbal phrase underlined was "to arrive at the base camp"

It's an infinitive verbal phrase as it focuces on the indefinite form "to arrive"

It modified the word "eager", which is an adjective, and it gives more information about how eager, or what the reason for the eagerness was - this means it's an adverb phrase

So the answer is: infinitive; adverb