[verb (plain)] + が + Clause 2
[i-adj (plain)] + が + Clause 2
[na-adj] + だ + が + Clause 2
[noun] + だ + が + Clause 2
The ~が structure is used as a conjunction to connect two clauses, expressing contrast or contradiction between them. It is commonly translated as "but" or "however" in English.
Note: In written or formal Japanese, が is used instead of casual connectors like けど or けれど.