Contrast: Although I was strongly angry at her attitude with me, I decided to help her after all.
Another sentence coul be: Although he has plenty of money, he does not spend much.
An adverb clause is a dependent clause that functions as an adverb in a sentence. Adverb clauses are introduced by a subordinating conjunction including after, although, as, because, even, if, once, so that, since, until, when, wherever while whatever, etc and answers one of these four adverb questions: how, when, where or why.
In the case of adverb clause of contrast, these clauses are used to make two statements, one of which contrast with the other. They begin with the subordinating conjunctions like “although, though, even though, despite, in spite of, whereas, while, even if and however.