如果要用英语表达「你不在水」的意思，可以说「You are not in water.」这个短语的来源可能源于人们经常在水中与他人交流，因此「不在水」就可能指的是不在可以交流的地方。例句如下：
I can't see you. You are not in water.
We usually meet at the pool, but you are not in water today.
Are you okay? You are not in water and I can't hear you.