Type Of Sound Change And Sound Change In The Way

The method of induction and deduction are two main scientific methods and they are also the most important methods applied in the study of languages . The content of my thsis is to analyse the type and ways of sound change using the induction and deduction methods in order to have further development in these aspects. Though there are many ideas about the type and ways of sound change , different opinions exist in the experts home and abroad, sometimes it is totally different .Neither can explain the types and ways of sound change systematically. Referring to the opinions of experts home and abroad, I have some different and comprehensive ideas concerning these problems by translating some articles and comparing different opinions.The thsis includes introduction, the first chapter sound change , the second chapter the type of sound change , the third chapter a glimpse of phonetic change , the fourth chapter the ways of sound change, appendix and reference. Phonetic change (this is the main part of my thsis , I class the sound change according to Trask referring to other experts' opinion at the same time. I have put sound change in a highly ruled system) and referrence.