As a Korean-American I feel like a large majority of Koreans (primarily the teens and young adults) are horrible at English, especially grammar. Out of all the Asian groups, Koreans seem to be the worst because almost every fob Korean I've encountered with make absolutely no sense when they are speaking English, which always puts me in a awkward situation, but at the same time, I find it funny as hell. When I have encountered with kids of other ethnic groups who aren't native English speakers - Chinese, Mexican, Greek, or whatever, nearly all spoke with an eloquent tone (although they had a horrible accent), their grammar was still on point and are hundred times better than how the Koreans speak English. Why is that? I'm still Korean so I kind of feel embarrassed myself. Instead of "How are you doing today" Koreans would say something like "How do you do today" or "How did you do today" something along those awkward lines. Or instead of "I will call you tomorrow and let you know", they will say something like "I will call you at tomorrow and I will tell you it" Terrible. Those who have gotten out of ESL still tend to have awful grammar skills, and the funny thing is - Everyone makes the same, common mistakes, which can be learned and mastered in a very short period. Do you think it is because Koreans always tend to hang out with their own group of Koreans, not willing to break through the language barrier? Because if that's true, it's no wonder that their English skills never improve. What are your opinions?