what are the prepositional phrases in the sentence: He ate three boxes of popcorn with butter during the movie.

The prepositional phrases in the sentence are: "of popcorn," "with butter," and "during the movie."

In the given sentence, "He ate three boxes of popcorn with butter during the movie," there are two prepositional phrases:

1. "of popcorn" - this phrase indicates what he ate.
2. "with butter" - this phrase describes how he ate the popcorn.

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To identify the prepositional phrases in the given sentence "He ate three boxes of popcorn with butter during the movie," you need to look for words that indicate a relationship between a noun (or pronoun) and another word in the sentence.

A prepositional phrase includes a preposition (a word like "of," "with," "during," etc.) followed by a noun or pronoun called the object of the preposition. Let's break down the sentence:

1. "He ate" - Not a prepositional phrase, it's the main verb phrase of the sentence.
2. "three boxes" - Not a prepositional phrase, it's the direct object of the verb "ate."
3. "of popcorn" - This is a prepositional phrase. The preposition is "of," and its object is "popcorn."
4. "with butter" - This is another prepositional phrase. The preposition is "with," and its object is "butter."
5. "during the movie" - This is also a prepositional phrase. The preposition is "during," and its object is "the movie."

So, the prepositional phrases in the sentence are "of popcorn," "with butter," and "during the movie."