①I'd quite like to go out, (al)though it is a bit late.
②Although it was snowing, it was not very cold.
2)用though 时，可将强调的词前置，但although 不能。as也有此种倒装结构。
①Poor though / as he is , he is happy.
②Child though / as she was, the actress was drawing a crowd.
3)although 和 though 用作连词时不能和but连用，但可跟yet, still 等连用。
Although he lives alone, yet he is happy.
= He lives alone, but he is happy.
2. as far as
1)“与……一样远”“一直到……” (在否定句中也可用 so far as)
We didn’t go as [so] far as the others.
2)“就……而言”“从……来看”“尽……所能”“只要”(有时可用 so far as)
As [So] far as I know, that is highly unlikely.
Just use this room for the time being, and we’ll offer you a larger one _______it becomes available（10安徽33）
A. as soon as B. unless C. as far as D. until