The most different function of zai（在）in Xichang Dialect and Putonghua（普通话） is that zai（在）can be used as clause final particle showing static continuity or action in progress.Besides,zai（在）can be used with zhe er（这儿）and na er（那儿）to compose prepositional phrase zai zhe er/na er（在这儿/那儿） put before a verb as adverb showing action in progress.And zai（在）can be used with hai（还）to compose fixed phrase haizai（还在）modifying adjective showing something being in a certain state.