I want to go to Cambridge to learn 如何给孩子解释to learn 这里的to

I want to go to Cambridge to learn 如何给孩子解释to learn 这里的to I want to learn I want to learn _________swimming. i want to learn more__football I want to learn more I want to learn () art i want to learn to swim为什么加to I want to learn.还是I want to learning,为什么? I want to learn tennis和I want to learn to play tennis.哪个更准确 learn to I want to learn chinese in ZhuHai I want to learn more about computer.