NTOU Chinese Grammar Checker for CGED Shared Task

Grammatical error diagnosis is an essential part in a language-learning tutoring system. Participating in the second Chinese grammar error detection task, we proposed a new system which measures the likelihood of sentences generated by deleting, inserting, or exchanging characters or words. Two sentence likelihood functions were proposed based on frequencies of spaceremoved version of Google n-grams. The best system achieved a precision of 23.4% and a recall of 36.4% in the identification level.