My pronounciation is not the best, still have some problem with "l" at the end of the words. But I know I am much better then a lot of people. I notice that a lot of people have difficulty differenciating "V" and "w", "i" and "ee" and"e" and "A". When you pronounce 'v", upper teath touch your lower lip slightly. with 'w" you don't touch your lower lip at all. with "i", you open your mouth very small and the sound is very short. "ee" is much longer. 'E" and "'A", you open your mouth much wider in A. hope this little reminder will help.