swim的过去式: swam;
swim:v.游水;游泳;游泳(作为娱乐);游;
swim的过去分词: swum
We swam in the lake.
我们在湖里游泳。
His head swam and he swayed dizzily.
他感觉天旋地转,摇晃起来。
I turned and swam a few strokes further out to sea
我转身向海里又游了几下。