【正文】 h of their voice. This phenomenon is called intonation. Intonation ?Intonation refers to the rise and fall of the pitch voice in spoken language. ?1 System of Intonation ?2 Structure of Intonation ?3 Types of nuclear tone ?4 Functions of intonation System of Intonation ?As far as intonation processing concerns, there are in turn three sets of choices. They are: (1) how to break the utterance up into chunks, (2) what is to be accented, and (3) what tones are to be used (Wells 2023:6). Halliday refers to them as tonality, tonicity and tone (. three Ts). System of Intonation ?Generally tonality decides how many pieces of information in one utterance。 。 :33:4018:33Mar2315Mar23 ? 1越是無能的人，越喜歡挑剔別人的錯兒。 , March 15, 2023 ? 閱讀一切好書如同和過去最杰出的人談話。 :33:4018:33:40March 15, 2023 ? 1他鄉(xiāng)生白發(fā)，舊國見青山。 tonicity decides the focus of information。 2023年 3月 下午 6時 33分 :33March 15, 2023 ? 1行動出成果，工作出財富。 18:33:4018:33:4018:33Wednesday, March 15, 2023 ? 1知人者智，自知者明。 下午 6時 33分 40秒 下午 6時 33分 18:33: ? 楊柳散和風，青山澹吾慮。 18:33:4018:33:4018:33Wednesday, March 15, 2023 ? 1乍見翻疑夢，相悲各問年。 and tone decides the concrete meaning of information except the lexical meanings which is decided by words. how the three Ts works in intonation system Structure of Intonation ?In a tone unit, there are words with different significance. Speakers usually want to make some words stand out as the focus of the information by adding accent and pitch movement. ?Each tone unit contains one piece of information, namely one focus of information. The nucleus is attached to the focus of information Structure of Intonation Stressed syllables in these words are the nucleus of this tone unit and they are obligatory. Syllables before or after the nucleus are optional and are termed as “prehead”, “head” and “tail” according to the traditional British approach. The most mon position for the tonic or nucleus is on