kurumanonakanikagiwo忘れるwasureruとはtohakimihaうかつukatsuだったdatta
It was careless of you to leave the key in your car.

© Based on JMdict, KANJIDIC2, and JMnedict, property of the Electronic Dictionary Research and Development Group, used in conformance with the Group's licence. Example sentences from the Tatoeba project (CC BY 2.0). Kanji stroke order data from the KanjiVG project by Ulrich Apel (CC BY-SA 3.0). See comprehensive list of data sources for more info.

Search other dictionaries for 車の中に鍵を忘れるとは君はうかつだった。:
Yahoo!辞書 / goo辞書 / alc.co.jp / Weblio / Wiktionary