keep是英语高频动词,用法灵活,涵盖状态维持、动作持续、物品保管等多重含义。其核心用法包括:一、表“保持”状态,后接形容词(如keep calm)或名词(如keep the receipt);二、表“持续”动作,后接动名词(如keep practicing),否定用keep from doing;三、“使某人/某物处于某种状态”,接复合宾语,宾补可为形容词、副词或介词短语(如keep children quiet, keep books on the shelf);四、与介词构成固定短语,如keep u...