带the的表示特指某一个公园；不带the就是泛指去那个公园。
例句
I go to the park in the afternoon.
下午的时候，我去公园。
We go to the park with them.
我们和她们一起去了公园。
We didn\'t go to park yesterday, did we?
我们昨天没有去公园，不是吗？
Where do I get off to go to Park Avenue?
我去派克大街，应该在哪站下车？
After lunch Jimmy and his mother go to park.
吃完午餐，吉米和妈妈去公园了。
