在家待了两天可以用英语表达为 "I have stayed at home for two days."

来源：这是一个由动词"stay"和副词"at home"组成的短语。"Stay"的意思是"待在某处"，而"at home"的意思是"在家"。

下面是一些英文例句及其中文翻译：

I stayed at home all weekend. 我整个周末都呆在家里。
He has been staying at home since he got sick. 他生病后就一直呆在家里。
She will stay at home tonight because she is not feepng well. 她今晚会呆在家里，因为她感觉不舒服。