It is well known that most Chinese nonEnglish majors can't understand the English materials they have heard,but they do understand them if the materials are in written form.Though there may be a lot of reasons (Such as phonological and psychological ones),this paper covers the influence of sound changes in connected speech upon the learners' listening comprehension.Non-English majors can improve their listening comprehension,to some degrees,by getting familiar with and being practiced in sound-changes in a flow of speech,with the help of a good attitude towards sound-changes in English speeches.