Although the character and character co-occurrence features (adopted in most current approaches) are able to partially characterize the internal structure of words (Sun, 2010), and some OOV words are indeed correctly handled when compared to pure wordbased approaches (Zhang et al., 2003;Gao et al., 2005), suffix related errors still remain as an important type of errors.
it is natural to expect that suffixes can be explicitly utilized to provide further help.