north与northern用法区别

east/south/west/north/southeast/southwest/northwest/northeast
以上8个单词兼有三种词性:名词/形容词/副词
eastern/southern/western/northern/southeastern/southwestern/northwestern/northeastern以上8个单词只做形容词
表方向结构:
1. in/on/to+the+方向名词+of+某地
2. in/on/to+the+方向形容词(-ern)+part of+某地
3. in/on/to+(大写的)方向名词/方向形容词+(大写)某地:专有名词
4. 方向副词+of+某地
以上in表前者在后者范围之内; on表两地相邻但不相属; to表两地即不相属也不相邻
如: Anhui lies in the east of China.
Anhui lies in the eastern part of China.
Anhui lies in East/Eastern China.
Anhui lies east of China.