在英国呆着可以用 "stay in the UK" 或 "be in the UK" 来表示。
"Stay" 在这里是动词，意思是 "停留，呆在某处"。"In" 是介词，意思是 "在…之内"。"The UK" 是英国的缩写，意思是 "联合王国"。
例句：
I'm staying in the UK for a few more weeks. (我在英国再呆几周。)
I've been in the UK for three years now. (我已经在英国呆了三年了。)
Are you going to stay in the UK or move back to your home country? (你是继续呆在英国还是回到自己的祖国？)