好了

Use it as a standalone exclamation or at the end of a sentence. When you finish a task, just say 好了!. If you are waiting for a friend to get ready, ask 好了吗?. The 了 indicates a change of state. You weren't ready before, but you are now. It is like the 'ding' on a microwave.

Use it at a restaurant when the waiter asks if you are done. Use it when texting a friend to say you've arrived. It is perfect for stopping someone who is over-explaining something. You can also use it to comfort someone, like saying 'there, there.' It is the ultimate social lubricant for transitions.

Don't use it in very formal speeches to mean 'the end.' It is a bit too casual for a board meeting presentation. Avoid using it with a sharp, rising tone if you don't want to sound annoyed. If you say it too fast to a superior, it might sound like 'Okay, shut up.' Use 可以了 for a more polite 'that is enough.'

Chinese culture values efficiency and harmony. 好了 wraps up interactions neatly without fuss. It reflects a mindset of 'attaining the state of good.' In many households, you'll hear parents shout this when dinner is on the table. It is the sound of a task completed with care. It is deeply rooted in the concept of 'completion' being a positive state.

快好了 means 'almost done' or 'nearly there.' 已经好了 emphasizes that it is 'already finished.' If you are annoyed, you might say 好了好了!. That is the universal signal for 'I get it, please stop talking.' Use 准备好了 specifically for 'I am prepared.' Each variation adds a tiny flavor to the basic 'done' meaning.