Except for being temporal prepositions,temporal conjunctions and conditional conjunctions,deng(等)and dengdao(等到)in the Chengde(承德)dialect have developed into successive conjunctions and contrastive conjunctions and can serve as discourse markers,which is different from their uses in Mandarin Chinese;dengdao(等到)developed further into a filler.The uses ofdeng(等)and dengdao(等到)can be explained with the grammatica-lization of the two,developing from verb(phrase)into prepositions and conjunctions.