very good 修饰名词,很好,很棒的意思。you have done a very good job
very well 修饰动词,意思同上。you did it very well.
very nice 修饰名词,有善良的意思。she is a very nice womam.她是个很善良的女人。
very fine 口语,很好。-Madam, i have finished the job.
-ok, very fine. 很好!
参考资料:http://zhidao.baidu.com/question/8167144