问题补充：
短文改错 (共10小题；每小题1分，满分10分)
Today I was having a PE lesson while I fell down and hurt my foot．I was in great pain at that moment but I tried to act as if nothing happened until the class was over． Although I had difficulty walk back to my classroom, but I still didn tell anyone and even refused the offer of help from my classmates． As the result, the hurt on my foot became worse．Now I know I am wrong．We can tell other our need for help and accept their help．Someday we can help him in return．In this way, we can get along with each other happy and peacefully．while改为when
答案：
(答案→)while改为when
解析：
【小题1】while改为when连词while后面只能接延续性动词，而本题后面的fall down是一个短暂性动词，故使用when。
【小题2】nothin后面接had 虚拟语气，本句是对过去发生的事情进行描述，如果as if后面的内容是假的，就使用过去完成时的形式。
【小题3】walk改为walking 固定句式have some difficulty doing sth做某事有困难。
【小题4】去掉but 连词although不能和but连用。
【小题5】the改为a固定搭配as a result结果是。
【小题6】on改为in介词In指在脚上。
【小题7】am改为was本句是指我知道我过去所做的事情错了，故使用一般过去时。
【小题8】other改为others本题中的others指其他人，又没有范围限制，故使用others。
【小题9】him改为them这里的them是上句的others。
【小题10】happy改为happily 本句副词happily与peacefully都做状语修饰谓语动词。
