although

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] 在英语中如果用了although 或 though, 就不能再用 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。

② Although it was so cold, he went out without an overcoat.

虽然天气很冷，他还是未穿外衣就出去了。

③ He is quite strong, although very old.

他虽然很老了，但还是十分健壮。

though

though 常用作连词，“虽然”。在口语中还用作副词，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。