you will always say 'to China' if you are speaking about the country. If you say eg. Come back China, it sounds like someone's name is China, and you would be calling your friend China to come back. 'Come back to China' is correct eg. I would love to come back to China sometime, I really enjoyed my holiday there. 'Go back to China' is also correct. On its own it is a command- telling someone to leave and return to China. or you can soften its meaning in a sentence. eg. I would love to go back to China once I learn how to speak Chinese properly. 'Get back to China' is not really correct even though it is sometimes used. eg. I would love to get back to China at some point. I would substitute 'get' with 'go' The difference between go and come is on the emphasis between leaving and arriving. If you go back to China, the leaving of the place you are currently in is the most important aspect. If you come back to China, the arrival in China is the most important aspect. 7. Again you need the 'to' so you would say 'to your home' OR if you leave out the 'your' then you can just say 'home' without the to. You would say go instead of get. eg. Go back to your home! eg. Go home! ( your is implied ) This is a command and quite a rude way of talking. Any time you say 'your home' it creates a distinction between my home and yours, and implies that we cannot share a home. eg. A racist person might tell a foreigner to 'go back to your home, you are not welcome here' . if you just say home ( without your) then it is softened and can be used in normal speech. eg. It's getting really late, shouldn't you go home? 8. Return to China / Return home would be correct. You don't need the back as return already implies that you were already there. (Return means the same as 'come back' ) Lastly: you can definitely say go back. It is used very commonly. eg. please can we go back to that shop where we bought the hat, I'd love to get another one. hope that helps :)