我真地觉得很对不起。

1. I'm extremely/awfully/terribly sorry.

2. I can't tell you how sorry I am.

3. I'm sorry indeed.

4. I really am sorry.

是我的错，对此我深感抱歉。

1. I really feel bad about that.

2. I'm terribly sorry about/for that.

3. I'm awfully sorry to do it.

4. It's wrong of me.

5. It was all my fault.

我并不是有意的。

1. I didn't mean to do that.

2. I honestly didn't mean that.

3. I didn't mean it that way.

我必须要道歉。

1. I must/have to apologize.

2. I apologize.

3. I do apologize.

4. My apologies.

你能原谅我吗？

1. Will you forgive me?

2. Can you ever forgive me?

3. Forgive me, please?