although 与 though 的区别：什么时候能互换，什么时候不能

although 和 though 都表示"虽然、尽管"，都用来引导让步状语从句。多数情况下两者可以互换，所以很多人干脆当成同一个词用。但有两个位置只有 though 站得住，另有一条铁律两者都不能碰。

先给结论：作连词引导让步从句时，两者基本可以互换；涉及"省略主语和 be"的简化从句，或把词放在句末表示"不过"时，只能用 though；而在正式书面语里，although 更稳妥。另外，两者都不能和 but 连用。

一、共同点：作连词时基本能换

两者都能引导让步状语从句，从句放在句首或主句之后都可以，从句和主句直接相接，中间不再加连词：

Although / Though it was raining, we still went for a walk.
She didn't stop working, although / though she was tired.

标点上的规矩是：从句在前时，从句后面加逗号；从句在后时，通常不加逗号。

Though / Although he is young, he knows a lot.
He knows a lot although / though he is young.

二、差异一：though 多出两种用法

这是两者最实质的区别，也是判断该用哪个词的主要依据。

2.1 省略句：省掉主语和 be

Though tired, he kept going.（尽管累了，他还是继续坚持）
Though a beginner, he finished the whole task.

这种简化从句（省略主语和 be 动词）几乎只用 though，although 一般不这么用。写成 Although tired, ... 会显得别扭。

2.2 句末作副词，相当于 however

He said he would come; he didn't, though.（他说会来，不过没来）
I like him. He can be annoying, though.（我喜欢他，不过他有时也挺烦人）

放在句末时 though 前面通常加逗号，表示补充说明或轻微转折。这时不能用 although 替换——although 只能作连词，永远不能放在句末。

三、差异二：语体与位置偏好

四、差异三：和 but / yet / still 的搭配

先说铁律：although 和 though 都不能和 but 同时出现。中文里"虽然……但是……"是成对使用的，英语里两个连词只能留一个。

错误：Although he is tall, but he isn't strong.
正确：Although he is tall, he isn't strong.
正确：He is tall, but he isn't strong.

至于 yet 和 still，像 Although he's rich, yet he's unhappy. 这种写法语法上成立，传统语法也认可，但现代英语普遍认为 yet 与 although 表意重复，正式写作里更倾向省掉。稳妥做法是只保留一个连词。

五、顺带两个高频搭配

这两个是固定搭配，不要拆开理解：

• even though：比 although / though 语气更强，表示明显的让步甚至"即使"。
• as though：相当于 as if，意思是"好像"。

Even though it was late, she kept working.（尽管已经很晚，她还在继续工作）
He looked at me as though he had seen a ghost.（他看着我，好像见了鬼）

六、一个高频错误：后面直接跟名词

although 和 though 都是连词，后面要接主谓结构，不能像 despite 那样直接跟名词短语。最常见的错法是用 although 起头：

错误：Although the heavy rain, we went out.
正确：Although it was raining heavily, we went out.
正确：Despite the heavy rain, we went out.

需要说明的是，though 的省略句后面可以跟形容词或名词（因为省略了主语和 be），例如 Though tired, he kept going.、Though a beginner, he finished it. 这属于省略句，和"连词直接跟宾语"是两回事。

七、怎么选：三条规则

• 正式场合、书面语和学术写作：优先用 although，语气更严谨。
• 口语表达，或需要位置灵活：用 though，尤其是句末作副词、以及省略主语和 be 的简化从句。
• 拿不准的时候：只当连词用时，两者随便选；但只要句子涉及"句末"或"省略主语 + be"，就只能是 though。

八、小结