再…也【zài … yě】

再 + adjective + 也 means "however [adjective], still…". 再 pushes the first condition as far as you like, and 也 says the outcome doesn't change.

The second half is often negative: nothing in the first half will make it happen.

With 怎么

再怎么 + verb covers effort: however hard someone tries.

Where the subjects go

A subject comes before 再 and before 也, never after them. When both halves share a subject, the second is dropped.

• × 再贵这件衣服，我也要买 → 这件衣服再贵，我也要买
• × 再忙，也我会来 → 再忙，我也会来

No 很, and not 再也

再 already pushes the degree, so the adjective takes no 很.

• × 再很忙也要吃饭 → 再忙也要吃饭

再也 with nothing between means "never again", as in 我再也不去了. Here 再 and 也 are always split by the condition.