swim的过去式: swam;

swim的过去完成式: swum;

swim的现在进行式: swiming

swim

英 [swɪm] 美 [swɪm]
v. 游泳; 游动; 旋转; 眩晕;
n. 游泳;

[例句]But they can't swim well.
但它们游泳不是很好.