Debby's blog

1.英文方位用法
A is in the east of B (A在B裡，A在B的東部)
ex: Japan is in the east of Asia.

A lies (to the) east of B. (A在B外，且不直接相鄰，A在B東方)
ex: Japan lies (to the) east of China.

A is on the east of B. (A在B外，AB相鄰，A在B東方)
ex: 廣東 is on the south of 湖南.

A is at the east of B. (把方位詞當成一點看待)
ex: There was a big battle at the north of the 遼東半島.

A lies 100 km to the east of B. (A位於B東面100公里處)
=  A lies 100 km east of B.


2.是否
是否開頭用whether不用if
ex: Whether we can stay with my mother is another matter.

介係詞後只用whether
ex: There was a big argument about whether we should move to a new house.

只有whether可接不定詞
ex: I'm not sure whether to go.

主詞補語用whether 不用if
ex: The question is whether the man can be trusted.

同位語用whether不用if
ex: You have to answer my question whether you love him.

資料來源: http://timeboy.pixnet.net/blog/post/25705091-%E3%80%8E%E6%98%AF%E5%90%A6%E3%80%8F(whether,-if)%E7%9A%84%E5%85%A9%E7%A8%AE%E8%8B%B1%E6%96%87%E8%AA%AA%E6%B3%95