从恋爱到婚姻通常用英文表达为 "from dating to marriage" 或 "from courtship to marriage"。这两种表达都表示从开始约会、交往到最终结婚的过程。

关于 "dating" 和 "courtship" 的来源，前者源自中世纪拉丁文 "daticus"，表示 "指定的日期"；后者来源于古英语 "court"，表示 "向某人求爱、追求"。

下面是一些例句：

My parents met through a mutual friend and started dating, and after a few years they got married.

He asked her out on a date and they hit it off, and soon they were in a serious courtship.

She wasn't interested in just dating around, she wanted a committed relationship leading to marriage.

以上例句的中文翻译分别是：

我的父母是通过一个共同的朋友认识的，然后开始约会，几年后他们结婚了。

他邀请她去约会，他们相处得很好，不久他们就处于一段认真的求爱关系中。

她并不只是想随便约会，她想要一段最终导致婚姻的承诺关系。