Meaning
Used when an action is not necessary.
Formation
- Drop い from the ない form and add くてもいい: 来なくてもいいです
When to use it
- Core use
- Do not have to do it
Example
明日は来なくてもいいです
You do not have to come tomorrow.
Important notes
- Pay attention to the word form before the construction and to the particles around it.
Common mistakes
- Do not translate the pattern word for word; first identify its function in the whole situation.