2) Please forgive me for...

请原谅我……
3) Pray forgive me!

请原谅我吧!
4) Please forgive me for breaking my promise.

请原谅我的食言。
5) saying your reverence

恕我冒昧;请原谅
6) I must ask to be excused.

我必须请求原谅。
参考词条