Although ... but ... with 虽然…但是 — Chinese grammar (HSK 2)

虽然 + Clause，但是 + Clause

虽然 (suīrán, although) starts the concession and 但是 (dànshì, but) starts the contrasting clause. Just like 因为…所以, Chinese uses both halves together, whereas English drops "but" after "although". 虽然 can be left out in casual speech, but 但是 usually stays.

Examples

虽然很贵，但是我很喜欢。 Suīrán hěn guì, dànshì wǒ hěn xǐhuan.	Although it is expensive, I like it a lot.
虽然他很忙，但是每个星期都跑步。 Suīrán tā hěn máng, dànshì měi ge xīngqī dōu pǎobù.	Although he is busy, he runs every week.
虽然天气不好，但是我们去了。 Suīrán tiānqì bù hǎo, dànshì wǒmen qù le.	Although the weather was bad, we went anyway.

Tip: Do not drop 但是 just because English drops "but"; 虽然很贵，我很喜欢 sounds incomplete.