AnalyzerSentence analysis3SpansSentence背伸びをする1000 character limitAnalyzeSentence背せ伸のびをするSpan Details背せ伸のびstanding on tiptoe and stretching; stretching oneself taller; overreaching oneself; trying beyond one's ability; pushing too hardnoun, suru verbをobject markergrammarするlight/support verb with a noun or noun-like phrasegrammar