Park Sang-Soo. 1998. A Diachronic Analysis to the That-t Effect. Studies in Modern Grammar 13, 1-24. In Old English period paet(=that)-t constructions were grammatical because bxt was originated from the demonstrative pronoun that had Agreement and Case features and accordingly the grammatical function of paet was the same as that of the neuter singular nominative demonstrative. As the inflections came to be leveled in Middle English period, paet/pat(=that) was reanalyzed as an indeclinable word and the grammaticality of a pat-t construction was also changed. In Modern English period tiat-t constructions are ungrammatical because that is recognized as a pure function word and it checks off [+F](=finiteness) operator feature of a tensed clause as a clause indicator and [-Q] feature of a declarative sentence as a mood indicator. This paper suggests that that be taken to be not a complementizer but a C-checking function word of [+F] and [-Q] features to account for the that-t effect as well as the adverb-effect in a principle way.

• 박상수 | Sang Soo Park