The dialect adverb Duofen(多分) arose in the Yuan Dynasty and is still used in modern Wu dialect.It takes form by the gradual grammaticalization of the noun Duofen which means general in the location of adverbial modifier.The dialect adverb Nanshuo(难说) arose in the Ming Dynasty and is still used in modern Wu dialect and JAC Mandarin.It was the result of the generalization of the synonymous adverb Nandao(难道).