I beg your pardon.请原谅我
Pardon/Excuse me, please.请原谅我。
Please forgive me/my son.请原谅我儿子
Please forgive me for forgetting your name/breaking the promise.请原谅我，忘记了你的名字/没能遵守诺言。forgive sb for doing sth.
原谅某人做某事
Please forgive him for my sake. 看在我面子上就原谅他吧。for one's sake
看在某人的面子上
Please accept my apologies. 请接受我的道歉。
Can you forgive me?你能原谅我吗？
Give me a break. 饶了我吧。
Dialogue1:
A: Excuse me, I didn't mean to step on your foot.对不起，我不是故意踩你的脚的。
B: No problem, you're pretty light. 没关系，你踩得很轻。
Dialogue2:
A: Can you forgive me?你能原谅我吗？
B: I don't know, it's going to take some time. 我不知道，那得花点儿时间。
Dialogue3:A: Give me a break, it's not like I did it on purpose, 饶了我吧，我不是故意那么做的。
B: No. That's what you always say, then you just go ahead and do it again. 不行，你总是这么说。然后你还会再做。
Dialogue4:A: Please forgive my son for not finishing his homework. He's been very sick.原谅我儿子没能完成作业，他病得挺严重的。
B: That's OK. Just have him turn it in by next week. 没关系，让他在下周前交上就可以了。