1. A method for constructing a Chinese dictionary, comprising: determining a probability for nominalization of a Chinese term with a given collocation term according to a determination rule and the correlation between the Chinese term and its corresponding collocations, wherein the Chinese term is determined to be a verb part-of-speech; modifying the verb part-of-speech of the Chinese term with the given collocation term to an appropriate part-of-speech when the probability for nominalization of the Chinese term with the given collocation term is higher than a predetermined value; and storing the correlation between the Chinese term, the given collocation term and the appropriate part-of-speech in a storage device.