Comparing 以后, 然后, 后来 ("yi3hou4", "ran2hou4", "hou4lai2")

「以后」、「然后」和「后来」都用于表示时间上的先后顺序，但用法和侧重点不同。「以后」泛指某个时间点之后，可用于过去和将来；「然后」强调动作或事件的先后连接，常用于描述一系列步骤；「后来」特指过去某个时间点之后的情况，只用于过去。

'Yǐhòu', 'ránhòu' and 'hòulái' all indicate temporal sequence, but differ in usage and focus. 'Yǐhòu' broadly means 'after a certain point in time', applicable to past or future; 'ránhòu' emphasizes the sequential connection of actions or events, often used in sequences; 'hòulái' specifically refers to a time after a past point, used only for the past.

「以后」可以单独使用或后接时间宾语，表示在某一时刻之后，如「三年以后」「以后再说」。「然后」常用在叙述中连接两个分句，表示一个动作发生后接着另一个动作，如「先吃饭，然后去散步」。「后来」只能指过去，常用来讲故事或回忆，如「后来他去了美国」。注意：在表示将来的事件时，只能用「以后」，不能用「后来」。

'Yǐhòu' can be used alone or with a time object meaning 'after', e.g., 'sān nián yǐhòu' (after three years) or 'yǐhòu zàishuō' (talk about it later). 'Ránhòu' is often used in narratives to connect two clauses indicating sequence, e.g., 'xiān chīfàn, ránhòu qù sànbù' (eat first, then go for a walk). 'Hòulái' only refers to the past, often used for storytelling, e.g., 'hòulái tā qù le Měiguó' (later he went to the US). Note: For future events, only 'yǐhòu' can be used, not 'hòulái'.