Does your aunt live in the UK? - is correct Why: We have an interrogative sentence (question) with the verb which means action "to live" If we have an action in the sentence (in the Present tense) and we need to make a question of it-we need a "helper"- do or does. Does is used with "he, she or it"-and in our case "aunt" is "she"...so we put Does first. We know that after he, she, it we put -s at the end of the verb...BUT ..the "helper" doeS took this "-s"...that is why we use "live"..but not "lives". And that's why we have: Does your aunt live...?

Does your aunt live in the UK? Do your aunt(s) live in the UK?

我（me）是第一人称，你（you）是第二人称，其他都是第三人称。针对第三人称疑问句，用Does提问。如果是第一人称，第二人称的疑问句，用Do提问。疑问句动词用原形，所以，不加"s"

A - does is auxiliary And the verb have to be on the infinitive.