Before the age of one, if a child has not heard the pronunciation of a certain language, then at the age of one, TA may lose the ability to distinguish the nuances of the pronunciation of this language. At the same time, children's vocal organs are very soft, and vocal cords, lips and tongues and other motor nerves have great plasticity; However, with the increase of age, the children's pronunciation organs gradually tend to be stereotyped. Therefore, when children begin to learn different languages in early childhood, their pronunciation organs will naturally adjust their shapes to match the pronunciation of these languages, so as to master pronunciation skills and form correct pronunciation.

After the age of three, children will receive English enlightenment. Because their Chinese expression is already very good, such children often refuse to speak English, mainly because their emotional filters have begun to exclude new cultures and languages.