I found that he could not swin .

我发觉他不会游泳。

Rub yourself down properly after your swin ; I won 't have you catch a cold .

游泳后给自己适当按摩，我可不愿见你感冒。

We 've just about got time for a quick swin before breakfast .

早饭前我们刚好有时间游一小会儿泳。