帮忙看看这一句话英文句子有没有语法错误？

第一句：l thought l was really great .Beacuse l helped the old lady in time.

第二句：l was on my way home with my classmates,Ben (PS:classmates 的S到底要不要加啊？后面不是Ben嘛一个人嘛）

这不是什么题目，是我自己写的英语作文里的话。帮忙看看有没有语法错误~

英语老师抄给你的 你就表 问类- - 错了 找 英语老师去。。

应该是classmate吧

l thought l was really great .Beacuse l helped the old lady in time. 应该是THINK

l was on my way home with my classmates,Ben

如果是连字符应该为Ben

这样也不错。