在英语中，"医院"的直译是"hospital"。所以，如果想要用英语表示医院在南边，可以使用以下说法：
The hospital is to the south.
The hospital is located to the south.
The hospital is situated to the south.
这些句子都使用了英语中表示方向的副词"to"或"toward"，以及"south"这个名词，表示医院在南边。
英语中的"to"这个介词来源于古英语"tō"，意思是"向"、"朝"。"South"这个名词来源于古英语"sūþ"，意思是"南"。
下面是一些英语例句及其中文翻译，供你参考：
The hospital is a few blocks to the south. (医院在几个街区的南边。)
I need to go to the hospital to the south for an appointment. (我需要去南边的医院开个预约。)
The hospital is located just to the south of the park. (医院就位于公园的南边。)