关于口语特训里面的一个句子

happyjd

这本书里面的有篇口语范文讲到：高年级的学生教我们唱所有的歌....等到我们长成为大孩子后，我们就把学过的歌再教给别人....

The older girls at school taught us all the songs......As we grew up and got to be the older girls, we would teach....

这里的older girls用法对么？是不是应该用elder girls呀？ 还是怎么用都行？ 哪位高人指点一下来....

dphxmg

Elder is more formal and usually used in written English. Generally, you can use older and elder exchangeably, except in the following sentences:
I am older than you. We are all getting older. As they grow older, lawyers get more experienced and skillful.