These two meanings are not as different as they might seem. Whereas"key"is the neaning of the tone in its paradigmatic env ironment, i.e. in association with other, non-tonal choices(those of mood), what we are describing now is the meaning of the tone in its syntagmatic environment, i.e. in succession with other tone choices (1) Tone Concord: sequences of two or more instances of the same tone. This the phonological realization of apposition between groups(paratactic elaboration) (2) Tone sequence: tone sequences 1-1, 3-1 and 4-1. A sequence of two semantically related clauses may be related in the grammar (a)cohesively,(b) paratactically,(c) hypotactically References [1] Bloomfield, L. 1911. The Indo-European palatals in Sanskrit []. The Americar Journal of philology 32(1): 36-57 [2] Bloomfield, L. 1925. On the sound-system of Central Algonquian [J]. language 1(4):130-156 [3] Boas, F. 1911. Handbook of American Indian languages (ol I)[M]. Wash ingte DC: Government Print Office(Smithsonian Institution, Bureau of American Ethnology) [4 Blutner, R,& Zeevat, H. 2004. Optimality Theory and Pragmatics /M Hampshire and New York: Palgrave Macmillan [5] Chomsky, N,& Halle, M. 1968. The Sound Pattern of English [M]. New York Harper and Row [6 Clark, J, Yallop, C. 1995. An Introduction to Phonetics and Phonology [M London Blackwell Publishers Ltd [7 Couper-Kuhlen, E. 1986. An Introduction to English Prosody [ M. London Edward arnold 8]Couper-Kuhlen, E, Selting, M. 1996. Prosody in Conversation [M. London Cambridge University Press [9] Firth, J. R. 1948[1957. Sounds and prosodies [A]. In Transactions of the Psychological Society [C], 127-152. Reprinted in J.R. Firth, 1957[C1, 121-138 [10] Firth, J.R. 1957. Papers in Linguis tics 1934-1951 [C]. London: Oxford nivers [11] Fox, A. 2001. Prosodic Features and Prosodic Structure: The Phonology of Suprasegmentals [M]. London: Oxford University Press [12] Gussenhoven, C,& Jacobs, H. 1998. Understanding Phonology [m]. London Edward arnold [13] Halle, M. 1959. The Sound Pattern of Russian [M]. The Hague: Mouton [14] Halle, M. 1962. Phonology in generative grammar [J] Word(18): 54-72 [15] Halliday, M.A.K. 1961[2002]. Categories of the theory of grammar [A]. In J J Webster, (Ed), On Grammar [C]. London: Continuum, 37-94 [16 Halliday, M.A. K. 1963 2007. Intonation in English grammar [A]. In J. J Webster, (Ed), Studies in English language [C]. London: Continuum, 264-286 [17]Halliday, M.A.K. 19662002]. Some notes on deep' grammar [A]. In J. J Webster, (Ed), On Grammar [C]. London: Continuum, 106-1176 These two meanings are not as different as they might seem. Whereas “key” is the meaning of the tone in its paradigmatic environment, i.e. in association with other, non-tonal choices (those of mood), what we are describing now is the meaning of the tone in its syntagmatic environment, i.e. in succession with other tone choices. (1) Tone Concord: sequences of two or more instances of the same tone. This is the phonological realization of apposition between groups (paratactic elaboration). (2) Tone sequence: tone sequences 1-1, 3-1 and 4-1. A sequence of two semantically related clauses may be related in the grammar (a) cohesively, (b) paratactically, (c) hypotactically. References [1] Bloomfield, L. 1911. The Indo-European palatals in Sanskrit [J]. The American Journal of Philology 32(1): 36-57. [2] Bloomfield, L. 1925. On the sound-system of Central Algonquian [J]. Language 1(4): 130-156. [3] Boas, F. 1911. Handbook of American Indian languages (Vol. 1) [M]. Washington, DC: Government Print Office (Smithsonian Institution, Bureau of American Ethnology). [4] Blutner, R., & Zeevat, H. 2004. Optimality Theory and Pragmatics [M]. Hampshire and New York: Palgrave. Macmillan. [5] Chomsky, N., & Halle, M. 1968. The Sound Pattern of English [M]. New York: Harper and Row. [6] Clark, J., & Yallop, C. 1995. An Introduction to Phonetics and Phonology [M]. London: Blackwell Publishers Ltd. [7] Couper-Kuhlen, E. 1986. An Introduction to English Prosody [M]. London: Edward Arnold. [8] Couper-Kuhlen, E., & Selting, M. 1996. Prosody in Conversation [M]. London: Cambridge University Press. [9] Firth, J. R. 1948[1957]. Sounds and prosodies [A]. In Transactions of the Psychological Society [C], 127-152. Reprinted in J. R. Firth, 1957 [C], 121-138. [10] Firth, J. R. 1957. Papers in Linguistics 1934-1951 [C]. London: Oxford University Press. [11] Fox, A. 2001. Prosodic Features and Prosodic Structure: The Phonology of Suprasegmentals [M]. London: Oxford University Press. [12] Gussenhoven, C., & Jacobs, H. 1998. Understanding Phonology [M]. London: Edward Arnold. [13] Halle, M. 1959. The Sound Pattern of Russian [M]. The Hague: Mouton. [14] Halle, M. 1962. Phonology in generative grammar [J]. Word (18): 54-72. [15] Halliday, M. A. K. 1961[2002]. Categories of the theory of grammar [A]. In J. J. Webster, (Ed), On Grammar [C]. London: Continuum, 37-94. [16] Halliday, M.A.K. 1963 [2007]. Intonation in English grammar [A]. In J. J. Webster, (Ed), Studies in English language [C]. London: Continuum, 264-286. [17] Halliday, M. A. K. 1966[2002]. Some notes on ‘deep’ grammar [A]. In J. J. Webster, (Ed), On Grammar [C]. London: Continuum, 106-117