Modal Verbs--Two Old Entries

For those who want to learn more about modal verbs, here are two old entries which might help you have a better understanding of these confusing words:

http://www.tiec.tp.edu.tw/lifetype/post/1130/25216

http://www.tiec.tp.edu.tw/lifetype/post/1130/25254

The best way to master them is to make sentences with them.