swim是动词,而swimming则是名词,表示游泳这项运动。 e.g. I usually swim a few laps as warm-up during practices.---我一般都会在训练中先游几圈作为热身。 My hobbies are painting and swimming.---我的兴趣是画画和游泳。 注:swim的现在进行时同样是swimming,不要把它和作为名词的swimming搞混了。 e.g. He is swimming right now.---她现在在游泳。