它有两个词性,可做副词,也可以做名词,如:名词: Now I am at home. 我现在在家。副词:I have to go home. 我得回家了
Home可以作名词也可以作副词.在go home ,come home等词组中是副词.同there,where.
home 也是名词!详见:http://www.baidu.com/baidu?ie=gb2312&ct=1048576&cl=3&word=home