okay

Compared meaning: acceptable, good, or feeling well (adjective).

比较义项：令人满意、可以接受、状态良好（形容词）。

• fine

  Fine is the most neutral, slightly formal way to say something is good enough or pleasant, often used for weather, plans, or agreeing calmly to a request.

  Fine 语气较中性、略正式，表示“足够好”或“令人愉快”，常用于描述天气、计划，或平静地同意某事。

  Is it fine if I call you back after lunch?

  午饭后我给你回电话可以吗？

• okay 本词

  Okay is the most common, casual word for acceptable or agreed, used constantly in speech for permission, agreement, or describing an average condition ('just okay').

  Okay 是最常用、最口语化的词，用来表示“可以/同意”，也常用于征求许可、表示赞同，或描述“一般般”的状态。

  Is it okay if I bring a friend to the party?

  我带个朋友去派对可以吗？

• alright

  Alright is very informal (some consider it nonstandard for 'all right') and is especially common when asking about or reassuring someone's wellbeing or safety.

  Alright 非常口语化（有人认为不是标准拼写“all right”），尤其常用于询问或安慰对方是否安好、安全。

  You look really pale — are you feeling alright after the trip?

  你脸色很苍白——旅行后你还好吗？

All three can mean acceptable or fine, but tone differs. Fine is slightly formal, common for weather, plans, or calmly agreeing. Okay is the most common and casual, used for permission or an average condition. Alright is very informal, used to ask about someone's wellbeing.

这三个词在口语中都能表示“还不错/可以/没问题”，很多语境下可以互换，但语气和典型场景有差异：fine 略正式、常用于描述天气、计划，或平静地表示同意；okay 最口语化，最常用来征求许可或评价“一般般”的状态；alright 非常口语化（部分人认为不是标准拼写“all right”），尤其常用于询问或安慰对方是否安好。这里不比较 fine 表示“精细的、小块的”等义项。