帮忙改一下英语作文
大家帮忙改一下这篇英语作文,有没有什么地方不妥当，只求说出语法错误处：
Two good boys
Li Lei and Zhang Ming are two good boys.They often help other peopel.
One day the weather was very hot,Li Lei and Zhang Ming were playing football on the grass.Suddenly,they saw an old man walking very slowly with a heavy bag.Li Lei said"Let's go to help the old man,shall we?"Zhang Ming said"OK,let's go."Then Li Lei and Zhang Ming went to help the old man.Li Lei,Zhang Ming and the old man walked together.And they were very happy.
At last,the old man said"You are good boys."
参考答案:1,the weather was very hot->it was very hot
weather不能说hot或cold，只能说good 或bad
2， on the grass-> on the lawn
“在草坪上”不是“在草上”