This paper presents a contrastive study between English, Chinese and Japanese Gapping and VP Ellipsis, and points out the importance of word order in ellipsis studies. The word order influences the differences of syntactic structures and produces the forward ellipsis and backwards ellipsis. The paper distinguishes the cognitive mechanism and syntactic mechanism. For Japanese ellipsis, the forward ellipsis can be accounted by cognitive mechanism, but when it is satisfied by the syntactic condition, the forward ellipsis will turn into the backwards ellipsis. Based on the cross-linguistic data, the paper concludes that the word order plays an important role in ellipsis study and is one of the ellipsis syntactic-semantic interface restrictions.