Read the sentences. My goal when visiting Alaska is to see the northern lights. I learned that the city of Fairbanks and Denali National Park are the two best locations in the state for viewing and photographing the lights. Which phrase is an infinitive phrase?

An infinitive phrase begins with “to” followed by a verb in its base form. In “to see the northern lights,” the infinitive is “to see,” and “the northern lights” completes its meaning. “For viewing and photographing” begins with “for” and uses -ing verbs, so it is not an infinitive phrase.

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