||Park, Se-Young. (2016). English Negative Inversion and Split Projection. The Linguistic Association of Korea Journal, 24(4), 179-195. This paper is research on English negative Inversion through the analyses based on Split Projection. Here, we have tried to solve two questions: One is "What triggers preposed negative movement and SAI movement?" and the other is "Where is the landing site of the movements? According to Park(1996, 2013)'s theory, these movements are caused by SHA and OSHA in functional categories (CP, FocP, TP). Unlike previous theories, the analyses on landing site of the movements are reinforced through OSHA in CP, FocP, and TP. The auxiliary in SAI moves to [Spec2, TP2], not to [Foc, FocP]. In the embedded clause, interrogative wh-phrase moves to [Spec2, FocP2], not to [Spec, CP]. Park(1996, 2013)'s OSHAs make it unnecessary to set up new topic phrases in Rizzi(1997)'s structure. If we assume Park(1996, 2013)'s OSHA as the available theory, we have better explanatory power to analyze intricate negative constructions with another focus phrase or topic phrases consistently.