I want to go swimming.为什么是swimming而不是swim?有同义句吗.

I want to go swimming.为什么是swimming而不是swim?有同义句吗. I want to go swimming.(改为同义句) I（ ）（ ）（ ）go swimming. I want to go swimming.改为同义句. I want to go swimming=I want to go to swim吗? 我经常去游泳 为什么是 go swimming 而不是 go to swim i go to swim=i go swimming吗 I want to go swimming this afternoon(同义句) I （）（）（）go swimmin I want to go swimming改同意句 I want to go swimming this afternoon 改为否定句 i want to join the swimming club 改同义句 1.i want to go swimming 2.where do you swim 为什么一个加ing一个不加ing i am go swimming还是i am go to swim