This paper argues that tso in Changde dialect is a sentence final particle and its use may trigger an implied clause. It is observed that tso is only allowed in a suggestive imperative, restricted to co-occurring with the adverb cian^(55)先 'first'. Besides, xa下or ta哒alternately appears in a tso-suffixed sentence. A comparison of tso in Changde dialecct to zhe in Mandarin on the one hand and to tşe^(55) in Longhui dialect on the other hand shows that tso has similarities to and differences from both. While zhe is an aspectual particle, it may also trigger an implicit meaning in [V+zhe] construction. Although both of tso and tşe^(55) can be used as sentence final particles to introduce a sequential event implicitly, the use of tso is more constrained than tşe^(55).