although的词源是even though. 它有两种用法:
1. introduce a statement that makes the main statement seem surprising or unlikely, 虽然, 尽管, 即使 =though

• Although Emma had only entered the contest for fun, she won first prize.
• Although Sheldon was only six, he graduated from high school.

2. 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.

a. Although and (even) though can be used at the beginning of a sentence or a clause [从句] with a verb. 在"She often visits Spain because she likes the climate."中，"she likes the climate"是从句，它为主句"She often visits Spain"增加了信息。

b. Though can come at the end of a sentence; Although can't.

c. Although, though和albeit可用于形容词﹑副词或副词词组之前，例如: She performed it well, although slowly.