although
单词辨析：
通常置于句首并用于正式场合，不能像 though 那样用于省略句或引出倒装语序的让步状语从句。
Although it was dark, he still worked in the field.
天黑了，他依然在田里劳作。
We bought the car although it was old.
虽然这辆车是旧的,我们还是买了下来。
作此义解时，只用于倒装语序结构中，语气强于 although 和 though。
Hard as he works, he can't support his family.
他工作努力，可还是无法养活一家人。
Pretty as she is, no one likes her.
她很美丽，但没人喜欢她。
在文体上不如 although 正式，常用于省略句，或引出倒装语序的让步状语从句。
Though (he is) living alone, he is very happy.
他虽然一个人生活，但很愉快。
Though (he is) certainly not a lady-killer, he is still very attractive.
他虽然还不至于让女人一见倾心，却很有魅力。
Strange though it may sound, I was pleased it was over.
尽管听起来也许很奇怪，但我很高兴这都结束了。
相关例句：
Although he had been treated with antibiotics, he went to the bathroom repeatedly.
虽然他已经服用了抗生素，但他还是不停地上厕所。
Although it is not in his power to do so, he said he would rebuild the Air Base
虽然这超出了他的能力范围，他还是说他会重建空军基地。
Although he was twice as old as us, he became the life and soul of the company.
虽然他的年纪是我们的两倍，但他却成为了公司的灵魂人物。
Although most condoms contain spermicide, there are some manufactured without.
虽然多数避孕套含有杀精剂，但也有一些是不含的。
It is important for us to meet personally although we have been in touch in various ways.
尽管我们以多种方式保持联系，见面对我们来说还是非常重要的。
Although there is no overt hostility, black and white students do not mix much.
虽然黑人学生与白人学生之间没有公开的敌意，但他们也不怎么来往。