The te-form verbs in the (West-)Kyushu dialects have a characteristic behavior in the verb conjugation system, which we call the "te-form phenomenon". This phonological phenomenon is that so-called SOKU-ON or HATSU-ON appears, corresponding to te in the standard dialect. This phenomenon depends on the difference of the stem-final segment. The te-form phenomenon is different across dialects. We assume that the e-deletion rule is the core of four rules governing this phenomenon. Differences of dialects are reflected in the applicational environment of the e-deletion rule. In addition, we discovered a "pseudo te-form phenomenon", which is partially similar to te-form phenomenon.
