It seems like an adjective in those phrases. Early用法： 一、early可以用作副词 early用作副词意思是“早；先；提早”,也可作“在初期，在早期”“从前，古时候”解。 early在句中可用作状语，主要修饰动态动词，也可修饰名词或介词。 二. Early是副词，a few hours early不构成词组，是中国式的英语。 请看下面两个例句： i came three hours earlier than the others.
Nicole Kidman's Early Modeling Photos are the Best Things You'll See
Hi, we all know that one month has three sections which are defined as early/middle /late +month, for example:
我比其他人早来三小时。 the ship arrived 30 minutes early.
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