The objectives of this research are to compare tonal realizations in Yong in citation form and connected speech and between 2 age-groups as well as to prove whether there is tone sandhi in Yong as proposed by Ruengdet Pankhuenkhat (1978). Six female... J. Gedney (1972). Some words not in that list were added. The connected speech was recorded during conversation between the informants and the researcher. The contexts analyzed are the middle and the end of non-emphatic affirmative utterances