だがBut, Still, However, Nevertheless

Both けど・だけど (and the polite ですけど), as well as だが・ですが, express contrast, similar to 'but,' or sometimes just indicate a transition (like 'and'). The key difference is that だが is more formal and used in written contexts, while けど is more casual. Both can be used at the end of a sentence to imply something is left unsaid.

The particle が in both patterns expresses contrast, similar to 'but' in English, or sometimes indicates a transition to additional information (like 'and'). The difference is that が follows directly after an い-Adjective or verb, while it requires だ or です after a な-Adjective or noun. が is somewhat formal and often used in writing or formal speech.

Both of these are linking phrases used to express contrast in Japanese. だが and ですが sound a bit stiffer than けれども or the more casual けど, and must follow a noun or な-adjective (in contrast, けれども would become だけれども in this case). Besides showing contrast, both が and けれども (or けれど・けど) can also be used to add background information without directly meaning 'but'.