和一个一年来好几次的老外应该说welcome back么

和一个一年来好几次的老外应该说welcome back么 welcome back!是地道的英语么? Welcome Welcome Welcome back welcome back welcome back, Welcome back! welcome back to school 和welcome to school 哪个对 跟老外说"can you speak Chinese?"是不礼貌的么?是应该说“Do you speak Chinese welcome to back和 welcom back哪个对? welcome next time这句话能和老外分别时说吗? Rumer的welcome back 的英文歌词 welcome back from beijing的中文是什么?