John is going steady with Mary, and they will probably get married one day.

约翰和玛丽稳定交往, 他们很可能有一天会结婚。

He's had lots of girlfriends but now he's going steady with a colleague and a wedding might be on the cards.

他以前交过很多女朋友，不过现在他和他同事的恋爱关系很稳定，他们很可能会结婚。

If you're going steady with someone, then I should meet him.

你有了稳定的恋情，我就该见见他。