What is the difference between 寝れなかったんです and 寝なかったんです ?

24 Oct 2017

Native language
English (US)
Closed question
Question about Japanese

What is the difference between 寝れなかったんです and 寝なかったんです?
Feel free to just provide example sentences.

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Deleted user
24 Oct 2017

24 Oct 2017

Native language
Japanese