hi
i think you want to know how to analyse words to prefix, root and suffix. it's good to know that:
1- if you see a word that doesn't have any stress be sure that it's root. e.g. last
2- if you see a word that have stress on the first syllable be sure that has atleast a suffix. e.g. painter
3- if you see a word that have stress on the second syllable you can say:
A) that word has two roots, so the stress is between two roots. e.g. goodbye
B) the word atleast have one prefix, so the stress is between prefix and root. e.g. unsafe
here is one f the most complete word root list:
http://www.usingenglish.com/forum/as...highlight=root
here is a list of prefixes and suffixes with it's pronunciation.
http://www.usingenglish.com/forum/as...highlight=root
Mehrdad Mozaffary