though

though
though 虽然尽管
Though we have tried our best, we lost the game.
虽然我们已尽了最大的力量,但还是输了。
I don't know him well though I've known him for a long time.
我对他并不了解，虽然我认识他已经很长时间了。
Though the task was difficult, they managed to accomplish it on time.
尽管任务困难,他们仍按时完成了。
They will probably win, though no one thinks so.
他们可能会获胜，然而没有人这样认为。

详解：

区别although和though:though可以做副词，指“但是”，但是although不行。as though属固定搭配，这里though不能替换成although。although要比though来得更正式，相对而言，语气比较重，但是though的使用更普遍。although引导的从句，常指实际发生的事情，而不是假象，设想。though和although都可在从句中用作连词，通常表示相同的意思，但though更普遍适应于非正式的表述中；
He said he would come, he didn't, though.
句中的though不能替换成although。
He would not be unhappy though he should have to live alone.
就算要一个人住，他可能也不会不开心。
He was not unhappy although he had to live alone.
虽然他不得不要一个人住，却没有不开心。
though已表示“然而，可是”，在句中，不可再与but连用。
Though he lives alone, but he is happy.
句子中的but要删掉。
though引导的句子有时有特殊的格式。值得注意的是，句子 Though loving him, I cannot help him是不成立的，因为没有though I was loving这一说法。
Though he lives alone, he is happy.
即使一个人，他还是很开心。
句子中的“he lives”可以省略掉。

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