课前准备：
预习第三章，结合自己实际情况，标记出比较难理解的地方。
教师导引：结合学生口语的经历，让学生试着谈论自己对相关术语的理解。
小贴士：是否在自身语言的学习过程中，思考过本章的某些内容？通过本章内容的阅读，自己对音位学本身有了哪些新的认识？
小试牛刀
What function do intonation and stress fulfill in English?
参考答案：
Stress and intonation generally occur simultaneously in utterance. When intonation contour falls on a syllable, the nucleus is stressed and the vowel is naturally lengthened a bit. In the meanwhile, there is a little pause after the syllable. This simultaneous functioning of the features servers to highlight the information focus, or to eliminate ambiguity.
Every component of a sentence contains some information. It may or may not be highlighted in speech, depending on the speaker’s intention and the situation. Intonation contour can indicate the information focus of the sentence. Intonation and stress are very important in that they can disambiguate phrases and sentences.
学习目标
1. Know the syllable structures and sequences of phonemes.
2. Understand the definition phonology, phonemes and allophones.
3. Understand and distinguish the meaning of Contrastive distribution, complementary distribution and free variation.
4. Understand the phonological rules and suprasegmental features.
知识结构
Terms in this chapter:
Phonology, phoneme, allophone, minimal pair, minimal set, complementary distribution, contrastive distribution, free variation, distinctive feature, suprasegmental feature, stress, intonation, tone
进入学习任务
