短语应用:I;m sorry to hear that your grandpa is ___ ___ ___ ___ (生病住院)

短语应用:I;m sorry to hear that your grandpa is ___ ___ ___ ___ (生病住院)
可不可以是 ill/sick staying in hospital
一楼的老兄：
in hospital是生病住院，in the hospital是在医院（没有生病，可以是医生大夫护士，也可以是探亲访友～这两个不能搞在一起吧？