When phonemes combine together,one phoneme will probably change owing to the influence of the neighboring phonemes or the speed,pitch and strength of a voice.This paper profoundly analyzes the influence of phoneme change on word's pronunciation and forms on the basis of assimilation,dissimilation,strengthening(insertion or addition),weakening(weakening and dropping).The paper makes a thorough description of the regular pattern and phenomenon of pronunciation which usually puzzle language learners.It's well-...