Run与running虽同源但词性不同,用法差异显著。Run可作动词原形或名词:作动词时表“跑、运行”等,需随时态和主语变化(如runs/ran/run),例“She runs daily”;作名词表“跑步、连续时段”,例“a run”“losing run”。Running是现在分词或动名词:作现在分词用于进行时,需搭配be动词,例“They are running”;作动名词可作主语、宾语或表语,例“Running improves health”“She enjoys running”;还可作定语表...