Abstract: In the comparative sentences of Tasha dialect,there are some special structures such as “Yi+Jia+A/VP+Xie”,“Yi+Jia+A+MP（Xie）”,“Yue ko Yue+A/VP”,“（一+M）+He/Bi（一+M）+A/VP +Xie”,“Jia+A/VP+De+Meide”.These comparative sentence structures differ from standard Chinese and surrounding dialects,which are the result of the influence of bilingual residents’ mother tongue when they speak Chinese.The Tujia and Chinese bilingual people are always influenced by the grammatical rules of their mother tongue when they speak Chinese.

Key words: Tasha dialect, comparative sentences, causes,influence