我不擅长游泳用英文怎么表达？

　　例句：

　　I go swimming twice a week.

　　我每星期游泳两次。

　　Swimming is good exercise.

　　游泳是有益的运动。

　　I think I'll pass on the swimming.

　　我想我不会去游泳。

　　I'm taking the kids swimming later.

　　我待会儿带孩子们去游泳。