时光飞逝用英语可以说是"time flies". 这个短语起源于英国, 是一个习惯用语, 意思是时间过得很快. 例如:

Time flies when you're having fun. (做得开心的时候, 时光飞逝.)

Time flies, doesn't it? (时光飞逝, 是不是?)

I can't believe it's been 10 years since we graduated. Time really flies. (我真的不敢相信毕业已经10年了. 时光真的飞逝.)

希望这些例句能帮助您理解这个短语的意思.