Read the sentence a student wrote. As he listened to the haunting notes of the song the author realized he had found the inspiration for his next suspense novel. The teacher reviewing this sentence would point out that since this is a

“As he listened to the haunting notes of the song” is a dependent clause that introduces the sentence. Because it comes before the independent clause, “the author realized he had found the inspiration for his next suspense novel,” it should be followed by a comma. The sentence is complex, so the correct choice is “complex sentence, there should be a comma after ‘song.’”

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