っぱなし details
lend + left in a state, uncorrected
kashi ppanashi
left in a state, uncorrected (often negligently); also — keep doing nonstop
meaning: be left lent
ドア、開けっぱなし！
doa, ake ppanashi!
The door is left opened! casual
今日は一日中立ちっぱなしで、足が痛い。
kyou wa ichinichijuu tachippanashi de, ashi ga itai.
I was on my feet the whole day today, and my legs hurt. neutral
- past
- polite
Examples
left in a state, uncorrected — someone should have undone it, and didn't
ドア、開けっぱなし！
doa, akeppanashi!
The door is left opened! casual
電気つけっぱなしで寝ちゃった。
denki tsukeppanashi de nechatta.
I fell asleep with the light left on. casual
会議室の電気をつけっぱなしにしないよう、ご協力をお願いいたします。
kaigishitsu no denki o tsukeppanashi ni shinai you, gokyouryoku o onegai itashimasu.
We ask for your cooperation in not leaving the conference room lights on. formal
keep doing continuously, without a break
今日は一日中立ちっぱなしで、足が痛い。
kyou wa ichinichijuu tachippanashi de, ashi ga itai.
I was on my feet the whole day today, and my legs hurt. neutral
朝からずっと働きっぱなしで、もうへとへとだよ。
asa kara zutto hatarakippanashi de, mou hetoheto da yo.
I've been working nonstop since this morning, and I'm completely worn out. casual
Formation
{V-masu-stem}っぱなしattaches to ます-stem
Notes
and unbroken continuous ACTIVITY (usage 2, 立ちっぱなし・働きっぱなし) — the
second never carries negligence, only duration.
Related patterns
Similar
窓が開けてある is neutral — someone left it that way on purpose, no judgment attached; 窓が開けっぱなしだ reports the identical state but adds the speaker's complaint that it should have been closed by now.
たまま frames the leftover state as backdrop to a separate main action (眼鏡をかけたまま寝た); っぱなし drops the second action and makes the leftover state itself the whole point of the sentence — in its leave-it-uncorrected sense, almost always as a criticism.