有句话是：Did you hurt yourself playing soccer?请问这里为什么用playing?

有句话是：Did you hurt yourself playing soccer?请问这里为什么用playing? Did you hurt yourself playing soccer?请问这里为什么用playing? Did you hurt yourself playing soccer .此句中划线部分（piaying soccer Did you hurt yourself playing basketball?为什么不用play basketbal 英语翻译Leo hurt himself playing soccer.为什么这里用playing,语法点是什么?第二, when did you hurt yourself last?这句话为什么不能用when have you hurt :i hurt myself playing soccer中playing做什么成份 Playing sports is good for us 这里为什么用playing 踢足球是play soccer还是playing soccer? I like playing soccer中的playing为什么不是play -( )you like playing soccer?-yes,very much Do you k like playing soccer.