The purpose of this study is to investigate the early wh-movement acquisition of English native speakers from the perspective of Minimalist Program. Guasti and Rizzi(1996) propose the null auxiliary hypothesis that the structure of the questions where the verb is inflected with -ing includes a null auxiliary, the counterpart of the lexical be. They draw a parallel between the null auxiliary and the early null subject. Rizzi(1997) proposes that the CP system, like the IP system, is layered. ForceP is the highest project which determines the clausal type and FocusP's specifier is the landing site for wh-operators and whose head hosts inverted auxiliaries. Guasti and Rizzi(1996) argue that children's auxless questions are structures truncated below ForceP. Thus, the null auxiliary, like other early phenomena, finds its source in the mechanism of clausal truncation. The phenomena of early language acquisition reflects the process of acquiring functional categories as children grow.

• 주영숙(부산외국어대학교)