write + (and…) + it's fine to do
kaite mo kamawanai
it's fine to do; I don't mind if you do
meaning: it's fine to write
それについては、あとで確認してもかまわない。
sore ni tsuite wa, ato de kakuninshite mo kamawanai.
As for that, it's fine to confirm later. neutral
この席、座ってもかまわない？
kono seki, suwatte mo kamawanai?
Is it okay if I sit here? casual