Is this correct 你一個人到這裡嗎 In the context of asking a chinese person who is living in say, spain, for not too long a period, is the above sentence correct if I want to ask “did you come here all by yourself?/are you here all by yourself?”? Another possibility I thought of was 你到這裡一個人嗎
你一個人到這裡嗎 is mostly correct. The complete version is 你是一个人到这里来的吗
A native way of saying so is 你是自己来这里的吗？A more northern version of it is 你是自个ge3（儿）来这（儿）的吗？
你到這裡一個人嗎 Is not correct.