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,我以前確實忘記過一些重要的事情。我曾經忘記了我最好朋友的生日,對此我感到非常糟糕。我們關係非常親密,所以我確保誠懇地道歉,並承諾彌補這個過失。