That-t 효과의 통시적 분석

A Diachronic Analysis to the That-t Effect

In Old English period þæt(=that)-t constructions were grammatical because þæt was originated from the demonstrative pronoun that had Agreement and Case features and accordingly the grammatical function of þæt was the same as that of the neuter singular nominative demonstrative. As the inflections came to be leveled in Middle English period, þæt/þat(=that) was reanalyzed as an indeclinable word and the grammaticality of a þat-t construction was also changed. In Modern English period that-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.