〜ことはない means "there''s no need to" or "you don''t have to." Often used to reassure or calm someone down.
Reassurance - Telling someone they don''t need to worry/do something
Unnecessary action - The action isn''t required
Different from なくてもいい which is more about permission.
See examples below for varied real-world usage.
Dictionary form + ことはない
- 急ぐことはない (no need to hurry)
Different from ことがない (never done something)
- ことはない = no need to
- ことがない = have never done
There's no need to apologize. You did nothing wrong.
You didn't have to come all this way.
In everyday context, There's no need to apologize. You did nothing wrong.
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