How old can immigrants reach the English level of their mother tongue?

Theoretically, the sooner the better. A child's brain is like a blank sheet of paper. If a lot of things have been written on it, it will be more difficult for you to find space to write. Preferably no later than 14 years old. According to relevant data, if children receive basic education in China and go to Canada later than 14, they need to make more efforts in language. There are many immigrant friends around me, and the difference in composition ability between children who go early and those who go late is more obvious. My own child went at the age of seven, and there seems to be no language problem at present. He has been taking esl classes for four months, so he can take classes with the big class.

The problem with going too early is that you may have forgotten your mother tongue. My son is a junior now. He can only speak very simple Chinese and can't write Chinese characters, but English is completely local pronunciation, no problem. English is also among the best in middle schools and universities. So if you don't want your children to forget Chinese, you can study in China until the third or fourth grade. I have a friend whose child passed the fourth grade and is now in college. Chinese and English are very good. Although Chinese writing is not as good as domestic children, it is enough for daily reading and communication.

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