一篇英语作文改错,求高手.（看图作文,图省） One day,a boy found a little girl fal

一篇英语作文改错,求高手.
（看图作文,图省）
One day,a boy found a little girl fall down,so he wanted to help her stand up.But his mother came to prevent him doing that.She said:"Don't do that,or others will think that it's you who knock her down."The other day,the boy found the oil bottle down to ground but he did nothing.His mother was surprise and asked him why.The boy said:"If I do that,you will think it's me who knock down it."
From this story we can know that parents are the first teacher to children and what parents did or said will have deep influences on children.So parents should teach their kids something good for society.
我自己写的,觉得不大好.希望可以得到一些修改意见,同时希望高手们可以介绍一些写作技巧.先谢谢啦~