If a person can't speak English at all, but bring him to America, how long will he have to learn English? ...

Haha, this question is difficult to answer. In many Chinatowns in Canada and the United States, many people have lived all their lives and still can't speak English. If you don't learn, how can you? Even in America and Canada, if you study, you must study. According to Jim Cummings' research, the daily muddling along is not up to the local level, but it takes two to three years, and some of them are 1 year. If you want to major, add five to seven years. In other words, having a major and a craft takes as little as 6 years and as much as 10 years, which is regarded as laying the foundation.