Yes, I have forgotten something important before. I once forgot my best friend's birthday, and I felt absolutely terrible about it. We're really close, so I made sure to apologize profusely and promised to make it up to them.
是的,我以前确实忘记过一些重要的事情。我曾经忘记了我最好的朋友的生日,我对此感到非常难过。我们关系非常亲密,所以我一定要深深地道歉,并承诺补偿他们。