短文改错。
假如英语课上老师要求同学们交换修改作文，请你修改你同桌写的以下作文。
文中共有10处语言错误，要求你在错误的地方增加、删除或修改某个单词。
增加：在缺词处加一个漏字符号(/\)，并在其下面写上该加的词。
删除：把多余的词用斜线(＼)划掉。
修改：在错的词下划一横线，并在该词下面写上修改后的词。
注意：1．每处错误及其修改均仅限一词：
2．只允许修改10处，多者(从第11处起)不计分。
Helen is one of my best friend. She had taught us English when I attended a training
class two years before. Helen always made good preparations for the lessons, but she
tried her best to make his class lively. I used to being poor in English, especially in
writing English. But now I'm able to write E nglish letters and reports correct. I still
remember how she helped me for my English patiently. Teacher's Day's coming. I'm
going to send to her a card and give her my best wishes.
______________________________________________________________________
