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Sentence

夜よるもエアコンをつけっぱなしにして寝ねた。

Span Details

エアコン

air conditioner; air conditioning; aircon

noun

つけっぱなし

leaving on; leaving engaged

adverbial form after an adjectival suffix

light/support verb with a noun or noun-like phrase

-> するgrammar

sleep (lying down)

-> 寝るichidan verb

past tense or completed action