【正确答案】正确答案：Communicative competence was proposed by D. H. Hymes, with four components: possibility, the ability to produce grammatical sentences; feasibility, the ability to produce sentences which can be decoded by the human brain; appropriateness, the ability to use correct forms of language in a specific socio-cultural context; performance, the fact that the utterance is completed. In Hymes" view, the learner acquires knowledge of sentences not only as grammatical but also as appropriate. The aim of language learning is the ability to perform a repertoire of speech acts so as to take part in speech events. This is another way of saying that learning language is learning to perform certain functions. Hymes" theory leads to notion/function based syllabuses, and a step further, communicative syllabuses. The theory of communicative competence stresses the context in which an utterance occurs. In its application, the teacher may teach how in different situations the same sentence can perform the function of statement, command, or request. On the other hand, while introducing different linguistic forms with the same semantic structure, for example the two forms of "you" in Chinese; he may draw special attention to different contexts in which they are used. The conceptual approach also leads to a concentration on discourse, in Hymes" term linguistic routines—the sequential organization beyond sentences. Thus in the teaching of literature, the teacher can focus on features of different genres. In the teaching of conversation, he can introduce such strategies as opening, continuing, turn-taking and closing. To present teaching contents of this kind, a learner-centered teaching methodology is necessary.