真对不起。

Place it at the start of your sentence to set the tone. You can use it alone if you are in a rush. However, it usually works best followed by the reason you are sorry. For example, use it when you step on someone's foot. Or use it when you forget a friend's birthday. It is simple, punchy, and very effective. It’s like the 'Swiss Army Knife' of social repairs.

Use it in everyday life when things go slightly wrong. It’s perfect for the office when you miss a small deadline. Use it at a restaurant if you accidentally spill water. It’s great for texting when you are running five minutes late. It bridges the gap between 'oops' and a major disaster. It sounds natural in almost any setting where you need to be polite.

Don't use it for massive, life-altering mistakes. If you crash someone's car, you might need something even stronger! Also, avoid using it for things that aren't your fault. In Chinese culture, over-apologizing can sometimes feel a bit awkward. If you just need to pass someone in a hallway, use 麻烦一下 (máfán yīxià) instead. Don't use it as a substitute for 'Excuse me' to get attention.

Chinese culture places a high value on 'face' and social harmony. Saying 对不起 literally means you can't face the person comfortably. By adding 真, you are showing extra humility. It signals that you value the relationship more than your own ego. It’s a powerful way to smooth over social friction quickly. It’s been a staple of polite conversation for generations.

If you want to sound even more formal, try 非常抱歉 (fēicháng bàoqiàn). For a tiny mistake with friends, a simple 不好意思 (bù hǎoyìsi) works. If you are really, really sorry, you can say 真真对不起. That extra 真 adds a layer of desperation! Most of the time, the standard version is exactly what you need.