Identify the infinitive phrase in the following sentence. wasps are starting to build a nest in our garage.

The correct answer is "to build a nest"

Explanation:

Infinite phrases are formed by the preposition "to"+ "bare verb" and its modifiers. Infinitive phrases have different functions within a sentence such as nouns, adjectives or adverbs.

In this case the infinitive phrase is acting as noun since it is the direct object of the sentence.

in june, we will have been married for eighteen months. (i am assuming this is what you want? the sentence, as you have presented it, is grammatically incorrect--   you want it corrected, yes? )

the answer is industry