10–14: in each sentence, locate the prepositional phrase. indicate the word that the prepositional phrase modifies and the part of speech that the word is. then, state whether the phrase acts in the sentence as an adjective or as an adverb.

10. the classes were all held in the morning.

11. work began promptly at nine o’clock.

12. the students found the illustrations of the problem interesting and .

13. teachers located materials on different topics.

14. classes like these kept the students busy

All the answers are in the explanation

Explanation:

10. The classes were all held in the morning. : The prepositional phrase. It's an   adverb. It's an adverb of time.

11. Work began promptly at nine o’clock. The prepositional phrase. It's an   adverb. It's an adverb of time.

12. The students found the illustrations of the problem interesting and helpful. The prepositional phrase. The italicized words change the illustrations: It's an adjective.

13. Teachers located materials on different topics. The prepositional phrase.  It's a mode adverb.

14. Classes like these kept the students busy. The prepositional phrase.  It's a mode adverb.

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