在“The Cutty Sark was one of the fastest sailing ships that has ever been built.”中,为什么用has

问题描述:

在“The Cutty Sark was one of the fastest sailing ships that has ever been built.”中,为什么用has

我也在纠结这个问题,定语从句的语法是one of 用复数,the one of用单数,但新概念饿这类句子,one of全是用单数的。我在一份资料里查到,非正式用法是这样的,不知道是否地道!

这里是现在完成时表被动,表示已发生并且对现在仍然有影响.
放在句子里是这是有史以来所造最快的帆船之一.
船是已经被造了,并且对现在仍然造成影响.