While young,the little girl could play the guitar very well

问题描述:

While young,the little girl could play the guitar very well
为什么while 后要用young,用法是什么?

这里省略了主语和谓语,还原就是
while she is young,the little girl could paly the guitar very well.
当while后面的be后的内容与girl形成修饰关系时,she is可以省略