east可作名词:东方,东部,China is in the east of Asia.
形容词:东方的,东部的,朝东的,the side of the street.
副词:在东方,向东方,The room faces east.
eastern可作形容词,东方的,东部的China is an eastern country.
中国是一个东方国家.
名词,东方人
east 指方向 eastern 方位