stay at home是固定用法吗?

stay at home是固定用法吗? 是stay in home 还是stay at home. stay home和stay at home 有一样吗? she isn't stay at home有这样的用法吗,在哪里 We stay at home days中的days是什么用法? stay后面是home能不能加at stay-at-home stay home vs stay at home stay at home and stay home stay at home 还是stay home? 是I stay at home to play games还是I stay at home to playing gam at the most basic 是固定用法吗?