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 like后面为什么加动词ING形式为什么只有 i like swimming而不这样说i like swim I like swimming中swimming为什么要用现在分词 i like swimming as 为什么favourite后加动词ing.如：My favourite sport is swimming.不是只有I like I like s( ) because I like swimming. I like going swimming 还是I like to go swimming? I like go swimming还是I like swimming哪个正确 i like go swimming 还是i like going swimming快 I like swimming还是swim? I don't like swimming. I like go swimming.I like gonging to swimming.I like go to swimming. I like swimming 用Tom 代替I I like swimming.I ___ ___ of swimming. I like swimming very much=I ( ) ( ) ( ) swimming 快! 我喜欢游泳,用英语说应该是 I like swim 为什么别人都说 I like swimming? swimming已名词化,为什么还能用在I like swimming in the sea中? I can help kids with swimming中swimming为什么要加ingcan 后不是原型吗?