〜なくてもいい

Pattern: 〜なくてもいい
Level: N4
Reading: 〜なくてもいい
Meaning: Don't have to; it is okay not to
Attaches to: Verb ない-form
Nuance & register: Expresses that something is not necessary.
Example: 明日来なくてもいいです。 You don't have to come tomorrow.