Ⅰ. although conj. “尽管、虽然”引导让步状语从句，相当于though. 只是比though稍微正式些。多用于句首。though用于非正式文体中，较普遍，但以下几种用法，不能用although. 如：

　　① 表强调时，要用even though,如：

　　Even though I didn’t understand a word, I kept smiling.尽管我一字不识，我还是一直微笑着。

　　②. Though可用在倒装句中，如：

　　Young though he is, he is quite experienced. 他虽然年轻，但很有经验。

　　③ though 可作副词，表示“然而”放在句末或其它位置。如：He said he would come, he didn’t though.他说他要来，结果他却没来。

　　[此外]，although不用着副词。在英语中如果用了although 或 though, 就不能再有but,但可以用yet 或still; 反之，如果用了but , 就不能用although 和 though. 如：

　　① Although he is in poor health, (yet) he works hard. = He is in poor health, but he works hard. 虽然他身体不好，但他工作仍努力。

　　②Although it was so cold, he went out without an overcoat.虽然天气很冷，他未穿外衣就出去了。

　　③ He is quite strong, although very old. 他虽然很老了，但还是十分健壮。

　　Ⅱ. though 常用作连词，“虽然”。在口语中还用着副词，一般放在句末，意为“可是、然而”等。如：

　　① He didn’t light the fire, though it was cold. 天气虽很冷，他却还没生火。

　　② Though it was very late, he went on working. 虽然很晚了，他还是继续工作。

　　③ He said he would come, he didn’t, though. 他说他来，可是结果他没有来。

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