I'm afraid that I broke your pen.

I promise I'll take it to the dry cleaner tomorrow.
I'm really sorry. I forgot your book.

I'll look for it again tonight.
I feel terrible. I can't find the CD you lent me.

I'll bring it tomorrow.
Mom, I'm very sorry. I spilled soda on your dress.

I'll buy you a present on the weekend.
I feel awful. I forgot your birthday.

I'm so sorry. I'll buy you a new one.