《英语修辞学(第2版)》:
The history of rhetoric covers about 2,500 years. For most of its history, rhetoric has been closely associated with education. As learners of English, we ought to understand its broad currents and crosscurrents. We need to know about rhetoric for other reasons. First of all, it is a compelling subject to study. Of course, many of us could read, write and speak without having read Aristotle. Knowing what he said won't necessarily make us better speakers or writers. But we shouldn't feel reluctant to study rhetoric for its own sake. We can appreciate Aristotle simply because he had important things to say. Second, knowledge of rhetoric helps us understand our world. As Kenneth Burke said, all human beings practice rhetoric and come under its influence. Every day we use words to shape attitudes and encourage people to act in certain ways. In one sense, teaching represents a rhetorical art. We can also find language used "as a symbolic means of inducing cooperation" in literature, advertising, broadcast, journalism, politics, religion, art, films, and conversation. Not all communication has a rhetorical purpose, but much of what we say, hear, read, and do involves influencing somebody else to make choices. Rhetoric is a humanistic discipline which enables us to understand those choices and the processes by which we make them.
As an art of verbal communication, English rhetoric is particularly essential to students of English and to those who use English as a communicative means. English language can be considered a tremendous system, which consists of at least three subsystems:①pragmatics and rhetoric; ②semiotics; and ③semantics. English beginners should, of course, lay special emphasis on semiotics first. But when their English proficiency comes up to an intermediate level, they should devote close attention to the study of pragmatics and rhetoric. To be effective in verbal communication in English, one has to study and acquire English rhetoric.
English rhetoric is important to reading and understanding. It often happens that students of English can not puzzle out the meaning of what they read though there are neither new words nor grammatical problem. The obstacles to their understanding may be rhetoric. Hard facts show that, without knowledge of English thetoric, foreigners can hardly understand English works in the original.
Good speaking and writing depend upon rhetoric. Good speaking and writing are more than making a collection of statements worthy of belief. Because speaking is intended for the audience and writing for the reader, whose minds are different from the speaker's or writer's, the listener or reader does not make the same mental connections the speaker or writer makes; he or she does not see the world exactly as the speaker or the writer sees it. He or she is already flooded daily with thousands of statements demanding assent, which he or she knows or believes to be false, confused, or deceptive. If the speech or writing is to get through to the speaker or writer - or even to be listened to or be read and considered at all - it must be interesting, clear, persuasive, and memorable, so that the listener or reader will pay attention to, understand, believe, and remember the ideas it communicates. To meet these requirements, the speech and work must have an appropriate and clear thesis, sufficient arguments and reasons that support the thesis, a logical and progressive arrangement, and an effective style.
Learning English is for the main purpose of effective communication, which results from a good command of the language in listening, speaking, reading, writing and translation. And all of these five linguistic abilities are closely related to rhetoric. The following example will show how rhetoric works in speaking and writing.
A invites B out to dinner, but B can't make it because he has another engagement. What would B say? Here are two versions:
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