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Sentence analysis
6Spans
Sentence
Span Details
夜間
night; nighttimenoun, adverb
の
possession, attribution, nominalizer, or nominal linkergrammar
警戒
vigilance; caution; alertness; precaution; being on guardnoun, suru verb
を
object markergrammar
怠っ
neglect; be negligent in; fail to do; get better; improve (illness)-> 怠るgodan verb
てはいけない。
must not; may notgrammar