In the opening scene when we first meet Beatrice and Benedick, we see that Beatrice uses a lot of rhetorical schemes to insult Benedick, while Benedick makes more use of figurative language. By the time they have fallen in love and confess to each about their love in the fourth act, we see that their language, especially Benedick's, has become more straight forward although Beatrice does still occasionally cling to her use of rhetorical schemes.
We see Beatrice making use of the rhetorical scheme epistrophe in order to sarcastically insult Benedick. Epistrophe is a rhetorical scheme in which the ending words of sentences are repeated (Dr. Wheeler, "Schemes"). We see epistrophe in Beatrice's questions to the messenger when she asks him how many men Benedick has killed in the war, as we see in the lines:
I pray you, how many hath he killed and eaten in these wars? But how many hath he killed? For, indeed I promised to eat all of his killing. (I.i.35-37)
Because the word killed is repeated...
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