NOTE ON USAGE 用法
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1 Although and (even) though can be used at the beginning of a sentence or a clause with a verb. *although和(even) though均可用于句首或从句之首, 与动词连用. Though is less formal *though较为通俗
*Although/Though/Even though we all tried our best, we lost the game. 虽然我们已尽了最大的力量, 但还是输了.
* We lost the game although/though/even though we tried our best. 我们输了, 然而我们已尽了最大的力量.
2 However can be used to give a similar meaning, but must begin a new sentence *however也可用以表达相同的意思, 但必须用于另起一句的句首
*We all tried our best. However, we lost the game. 我们都已尽了最大的力量. 但我们还是输了.
3 Though and however can come at the end of a sentence *though和however可用于句尾
*We all tried our best. We lost the game, though/however. 我们都已尽了最大的力量. 不过我们还是输了.
4 (Al)though (or more formal albeit) can come before an adjective, adverb or adverbial phrase *(al)though（更文雅的词是albeit）可用于形容词, 副词或副词词组之前
*Her appointment was a significant, (al)though/albeit temporary success. 她受聘虽说是临时性的, 但却是一大成功.
* He performed the task well, (al)though/albeit slowly. 他把任务完成得很好, 只是有些慢.

conj
[Date: 1300-1400; Origin: all 'even' + though]
used to introduce a statement that makes your main statement seem surprising or unlikely
= though
　Although in poor health, she continued to carry out her duties.
　We decided to take rooms in Longwood House, although we knew we could not really afford the rent.
　Although I can't help admiring the man's courage, I do not approve of his methods.
used to add a statement that balances or reduces the effect of what you have just said
= but
　You can copy down my answers, although I'm not sure they're right.
　No, this is my responsibility, although I appreciate your offer.