What grammatical structure is the italicized portion of the sentence?

By serving as a popcorn vendor, Don saw many good games.

appositive?

No.

What is italicized?

By serving as a popcorn vendor

sorry

What kind of phrase is it?

__present participial phrase

__nominative absolute
__appositive
__past participial phrase
__prepositional phrase with a gerund

What do you think?

not sure but prepositional phrase with a gerund?

i think it is prepositional phrase with a gerund but that's just me i could be wrong.

Yes. Both of you are correct. It's a prepositional phrase with a gerund. :-)

thank you Ms. Sue. :):):):):):):):)

To determine the grammatical structure of a sentence, you can examine the function and relationship of its individual components. In this case, the italicized portion of the sentence is "By serving as a popcorn vendor."

In this sentence, "by serving as a popcorn vendor" acts as an introductory phrase that provides additional information about Don's actions or role. It introduces the reason or manner in which Don saw many good games. This type of phrase is known as an adverbial phrase of means or manner.

So, the grammatical structure of the italicized portion is an adverbial phrase of means or manner, specifying how Don saw many good games. It functions to modify the verb "saw" and explains the method or way in which the action occurred.