However, there are still many limitations in phrase based models. The most frequently pointed limitation is its inefficacy to modeling the structure reordering and the discontiguous corresponding. To overcome these limitations, many syntaxbased SMT models have been proposed (Wu, 1997; Chiang, 2007; Ding et al., 2005; Eisner, 2003; Quirk et al., 2005;<cite> Liu et al., 2007</cite>; Zhang et al., 2007; Zhang et al., 2008a; Zhang et al., 2008b; Gildea, 2003; Galley et al., 2004; Bod, 2007) .