E3雅思「观点题」惩罚是帮助孩子们明辨是非的必要手段吗？

It is important for children to learn the difference between right and wrong at an early age. Punishment is necessary to help them learn this distinction.   

To what extent do you agree or disagree with this opinion?   

What sort of punishment should parents and teachers be allowed to use to teach good behaviour to children?