to go和going有什么区别有时候好像可以互相调换.有时候又不能.还有要怎样决定介词to和for在什么地方用?

to go和going有什么区别有时候好像可以互相调换.有时候又不能.还有要怎样决定介词to和for在什么地方用? GOING BACK TO 和GO BACK有什么区别 I am going to America和I am going to go to America有什么区别? i am going to swim 和i am going to go swimming有什么区别呢 we are going by bus .和 we are going to go by bus有什么.区别 go to bed early和 going to bed early有什么区别 How do go to school 和 how are you going to school有什么区别 where are you going、和where do you go to有什么区别. i am going to beijing ,与i am going to go to beijing 有什么区别 going和go to有什么区别?例如：I will go swimming.和I will go to swim.哪个正确,为什么 GO TO SLEEP和GO TO BED有什么区别? going shopping 和go shopping区别请问going shopping 和go shopping在用法上有什么区别? go to 和to go和 going 和going to 的区别和用法 i am going to swim 和i am going to go swimming有什么区别呢?答的正确送50分 go doing 和go to do有什么区别? go doing 和go to do有什么区别? go swimming 和go to swim 有什么区别? go home 和go to home有什么区别啊?