| Summary: | This paper begins with pointing the theoretical weaknesses of the CUC which is based on the uniformity condition (Chomsky (1992) and Chomsky & Lasnik (1993)). To solve the problems, I introduced the refined CUC and Barriers with a new adjunction condition that is adopted from Frampton (1990). Concerning the problems raised by subject/object asymmetry and wh-in-situ constructions, I have introduced a [+p] feature (Watanahe (1991) and Chomsky (1992)). However, I have stepped further from them. To have a more general theory, I have separated I-to-C Raising (or [T+AGRs]-to-C Raising) into two parts: the one occurring before Spell-Out by [+p], and the other after Spell-Out by IT+AGRs]. I assumed that erasure of offending traces in the Spec of AGRsP in the overt syntax through L-marking by [+p] does not influence the judgment of grammaticality at all. I have shown that the movement of Wh-in-situ at LF can also he explained by the constraints developed in this paper.
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