The mother tongue in certain extent influnce the language learning,such as mother gongue is the new knowledge to migration master interfering,such as speech migration,vocabulary,and grammar migration,the migration of pragmatics transfer,etc.This article from the contrast of mandarin and English,from phonemes system（phoneme）of comparison,allophone（syllable changes within）contrast,grammar change（syllable outreach sound change）compared to three aspects discuss specific contrast prolems.%母语在一定程度上影响着第二语言的学习,比如母语迁移即对新知识的掌握产生妨碍,如语音迁移、词汇迁移、语法迁移、语用迁移等。论文从普通话和英语的对比入手,从音素系统（音位）的比较、音位变体（音节内音变）对比、语法音变（音节外联音音变）对比三方面具体探讨语音对比问题。
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