Expressing "even if…" with "jiushi"
就是 + Hypothetical Statement + 也 + Action
- 就是 这 台 电脑 价格 上万，我 也 会 买。Even if this computer's price is over 10,000 yuan, I'm still going to buy it.
- 就是 降温 了，我 也 要 穿 热裤，时尚 嘛!Even if it's starting to get cooler, I'm still going to wear short shorts. It's the fad!
- 就是 他 变成 一个 穷光蛋，我 也 愿意 跟 他 在 一起。Even if he were penniless, I would still be willing to be with him.
Note that the clause used after 就是 must be hypothetical, otherwise 虽然 should be used:
- 现在 虽然 是 高峰期，但 我 也 要 出去。Although it's peak busy hours, I still want to go out.
- 现在 就是 是 高峰期，我 也 要 出去。
In the sentence above, it being rush hour is not a hypothetical statement, so it is incorrect to use 就是.
- Expressing "even if…" with "jishi"
- Expressing "even if…" with "jiusuan"
- Expressing "even if…" with "napa"
Sources and further reading