one person 释义：一个人

谓语动词是应该与one保持一致用单数。例如：

Only one person out of twenty is a farmer. 20个人中只有一个人是农民。

One out of every three persons makes his living from industry. 每3人中就有1人靠工业维生。

①用单数的例句：

One man in five was unemployed. 每五人中有一人失业。

One family in ten owns a dishwasher. 每十个家庭就有一家拥有洗碗机。

②用复数的例句：

Nationwide， one in five adults are illiterate. 就全国范围而言，五个成年人中有一个是文盲。

About one in every 20 people have clinical depression. 大约每20个人中有1个患有临床抑郁症