Which of the following sentences does not have an adverb clause? After I put my complaint on paper, I felt much better. Since David has a good memory, he can memorize his lines quickly. The frogs were frightened and frantically jumped away from the eager boy.

The correct answer is "The frogs were frightened and frantically jumped away from the eager boy". This is because both of these clauses are independent and none of them is an adverbial clause. The second part may seem like an adverbial clause due to the adverb "frantically", but it is not as it can be divided into two sentences "The frogs were frightened. The frogs frantically jumped away from the eager boy". In the first two sentences, there are adverbial clauses, a temporal adverbial clause and an adverbial clause of reason.