underway
In progress; in motion.
The yearly fund-raising campaign for the renovation of our university campus is already underway.
water over the dam
water under the bridge
Something that happened in the past and cannot be changed.
Что-то, что произошло в прошлом и не может быть изменено.
Since the sweater is too small already, don't worry about its shrinking; that's water over the dam.
I can see how upset you are because of the divorce, but it is water under the bridge now and you can’t do anything about it.
Я понимаю, что ты очень расстроен из-за развода, но прошлого не вернешь и ты не можешь ничего с этим поделать.