to excuse sb for doing sth
(for being about to do sth)原谅某人做某事
Please excuse us for abandoning you, but …请原谅我们抛弃你, 但是…
(for having done sth)原谅某人做了某事
You must excuse him for forgetting.你得原谅他的健忘。
Please excuse me for having kept you for so long.让你久等了, 请见谅。