i like swimming为什么加ing而i can swim为什么不加ing

i like swimming为什么加ing而i can swim为什么不加ing 为什么I can go swimming (swim)加ing而I can see the flowers不加(ing) 1.i want to go swimming 2.where do you swim 为什么一个加ing一个不加ing I like watching my goldfish swim around.为什么swim不加ing啊? 问个菜鸟英语问题哈~例如：I like swimming.(swim为什么要加ing?)I like play foot went swimming 为什么swim要加ing swimming lesson为什么swim要加ing I am going to go swimming tomorrow.swim为什么加ing I can help kids with swimming中swimming为什么要加ing Can you help kids with swimming?swim为什么加ing 又为什么加with I like doing some reading at home.这里为什么do+ing.而read也加ing I have a swimming lesson为什么swim用ing形式