thefirstone有错吗

the first one没有错，the first是第一的意思，形容词，可以用来修饰one，表示第一个的意思。

主要用于特指的场合the first one 和 first one 都可以用，但有区别：▲the first one 主要用于特指的场合。如：Our house is the first one on the right. 我们的房子是右边的第一栋。After their argument, he was the first one to hold out an olive branch. 争吵过后，他首先示好。I was the first one to get there, Helen arrived after a few minutes. 我是第一个到达那儿的。几分钟后海伦就来了。We had no idea which hotel would be best, so we just took pot luck with the first one on the list. 我们也不知道哪家旅馆最好，所以就碰运气挑了名单上的第一家。I never thought you’d be the first one to walk down the aisle—you used to say you’d never marry! 我绝没有想到你会是第一个走向婚姻殿堂的人——你过去常说自己永远也不结婚!▲ first one（没有定冠词），主要用于表示泛指的场合（通常与 another 连用）。如：Twilight deepened, first one, then another star appeared. 暮色渐浓，先是一颗星星，接着又一颗星星出现了。（张道真《现代英语用法词典》第1卷第171页）She chose first one, then another, but neither was to her satisfaction. 她先挑了第一个，接着又挑了一个，但两个她都不满意。（外研社•柯林斯《高级英语用法词典》第558页）◎另外当我们要表示两个当中“一个……另一个……”时，通常是用 one…the other…，但有时也说成 first one…the other…。比如英英词典对 backstroke(仰泳)的解释是：Backstroke is a way of swimming on your back by mov