write + (and…) + may do
kaite mo ii
may do; it's okay to do
meaning: may write
このパソコンは誰でも自由に使ってもいい。
kono pasokon wa dare demo jiyuu ni tsukatte mo ii.
Anyone may use this computer. neutral
この傘、借りてもいい？
kono kasa, karite mo ii?
Can I borrow this umbrella? casual