write + don't have to do
kaka nakute mo ii
don't have to do; it's okay not to do
meaning: don't have to write
明日はこなくてもいいよ。
ashita wa ko nakute mo ii yo.
You don't have to come tomorrow. casual
靴は脱がなくてもいいですか。
kutsu wa nuganakute mo ii desu ka.
Is it okay if I keep my shoes on? neutral