假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌写的以下作文。文中共有10出语言错误。每句中最多有两处，每处错误仅涉及一个单词的增加、删除或修改。
增加：在缺词处加一个漏字符号（），并在其下面写出该加的词。
删除：把多余的词用斜线（\）划掉
修改：在错的词下划一横线，并在该词下写出修改后的词
注意：1.没处错误及其修改均限一词；
2.只允许修改10处，多者（从第11处起）不计分。
May 10,2009 Fine
Today I was having a PE lesson while I fell down and hurt my foot. I was in greatly pain at that moment, but I tried to act as if nothing has happened until the class was over. Though I had difficulty walk back to my classroom, I still didn’t tell anyone but even refused the offer of help of my classmates. As result, the hurt in my foot bee worse. Now I know I was wrong. We can tell others our need for help and accept his help. Some day we can not help others in return. In this way, we can get along to each other happily and peacefully. while→when
网友回答
(答案→)while→when
解析：本文记叙了作者上体育课时不小心摔伤了脚，但是为了不向同学求助却一直强忍着，结果情况越来越糟糕，从而作者明白：遇难时可以寻求帮助，接受帮助，终有一天也可以帮助别人，这样人际关系会更和谐。
【小题1】fall down是瞬间动词，不能和while连用，应改为when，此处be doing...when结构中when是“这时（突然）”之意。
【小题2】此处是修饰名词pain,故应使用形容词great。
【小题3】文章的整体时态是过去时态，而has happened是现在完成时，属于现在时态，故应改为过去完成时。
【小题4】have difficulty (in) doing sth 做某事有困难，故walk应该改为walking。
【小题5】根据上下文的语境可判断此处和上文之间是并列关系，故不能用转折连词but.
【小题6】考查固定搭配。as a result结果。故 As后加上a
【小题7】从语法等各方面，此行均无错误。
【小题8】从上一行others一词可以断定是“他们的”而不是“他的”，故his改为their.
【小题9】根据句意，此处指的是我们也可以帮助别人作为回报，是肯定语气，故去掉not。
【小题10】考查固定搭配。get along with与。。。相处。