I'm confused because I don't know when to use however and although but I listened they're different. It's related with the clause term.
closed as general reference by onomatomaniak, Hugo, simchona♦, Barrie England, Matt Эллен Nov 19 '11 at 11:24
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However is an adverb. Although is a conjuction.
Although the sun is shining, it isn't very warm.
The sun is shining. However, it isn't very warm. OR It isn't very warm, however.
Although is always followed by a subordinate clause, whereas however is either followed or preceded by a comma, or both, as in:
I've got tons of things to do. So far, however, I haven't got round to doing a single thing.