求翻译：我有一美国朋友我的学校召外教我给他写信想让他来教授我们高中生英语口语英语写作今日美国今日英语每天12小时可以任选三门课我相信他是一个好老师所以我真心的想让你来给我们教英语是什么意思？

I have a United States friend called my school teacher, I write to him wanted him to teach us spoken English for high school students writing in English today United States 12 hours a day can choose any three classes of English today I believe that he is a good teacher, so I really would like you to teach English to us