I often go swimming in the water.

我经常在水里游泳。

Peter: Oh, I forgot about that. I go cycling sometimes too. And I often go swimming on vacation, but only recreational swimming.

彼得：噢，我忘了。我去骑自行车有时也是如此。我经常去游泳，但只有休闲度假游。

There is a creek behind the house in summer, I often go swimming in the creek.

屋子后面有一条小溪，夏天我常常到小溪中去游泳。