你可以说 "I've been staying at home." 或 "I have been homebound." 这种表达方式是常用的，源自英语的日常语言使用。下面是一些例句：
I've been staying at home for the past month because of the pandemic.
(因为大流行病，我已经待在家里一个月了)
I have been homebound due to my injury, but I'm recovering nicely.
(因为我受伤了，所以我一直待在家里，但我已经很好的恢复了)
I've been staying at home to focus on my studies.
(我一直待在家里专注于我的学习)