We're deeply sorry for the inappropriate remark earlier.

She apologized to me for stepping on my foot.

He apologized to us for having broken his promise.

He apologized for his rudeness.

He apologized for having offended her.

I apologized profusely for my being late.

You should apologize to Dad for not coming home in time for supper.

I must apologize to you for breaking the vase.

Why should I apologize to you?

We're very sorry that your order was damaged.

I must apologize for not having written for such a long time.

You should apologize for your rudeness.

I must ask your pardon.

He apologized for his rudeness, but she wouldn't forgive him.

I apologize again.

Again, a thousand apologies.