Final answer:
Without the provided sentence, it is impossible to identify whether the underlined phrase is a gerund, infinitive, or participial phrase. Each of these phrases serves different grammatical functions: gerund phrases act as nouns, infinitive phrases can function as nouns, adjectives, or adverbs, and participial phrases typically work as adjectives.
Step-by-step explanation:
In English grammar, gerund phrases, infinitive phrases, and participial phrases are used to add depth and variety to writing. Without the sentence provided in the question, we cannot determine which type of phrase the underlined phrase is. However, we can define each:
- A gerund phrase features a verb ending in -ing that functions as a noun and can take the place of a noun in a sentence.
- An infinitive phrase includes the word 'to' followed by the base form of a verb and can function as a noun, adjective, or adverb.
- A participial phrase includes a verb typically ending in -ing or -ed and acts as an adjective.
For example, 'Running marathons is exhausting' contains a gerund phrase (Running marathons) as the subject, 'To win the race would be an honor' starts with an infinitive phrase (To win the race) as the subject, and 'Exhausted from the run, she took a nap' contains a participial phrase (Exhausted from the run) modifying the subject.