|This example illustrates how to diagram an infinitive phrase being used as a noun in the position of an object of a preposition. "To leave for Europe" is the infinitive phrase. (NOTE: THE PREPOSITION IS NOT PART OF THE PHRASE.) The preposition "about" is placed on the slanted line below the verb, "was". Then the infinitive is placed on a standard in the position of object of the preposition. "To" is on the slanted line, "leave" is on the horizontal line, and the prepositional phrase: "for Europe" is diagrammed under the word, "leave" as a prepositional phrase. The infinitive phrase as an object is sometimes called "infinitive objective construction" in some books.||Francine
was about to leave for Europe.
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