We both liked the idea and have been working on it ever since. [=since then]我们俩都喜欢那个想法，并且从那时起便努力将它付诸实践。

I went to the festival its first year and have been returning ever since.我参加了这个节日的首次庆典，此后我每年都去参加。

She's wanted to be a firefighter ever since she was a young girl.她从小就想成为一名消防员。