关于over的用法？

Question

请问He expects a no-deal Brexit to lead to five to ten years of negotiations over trade. 这里的over什么意思

Answer 1

回答如下：
本句中的介词over的意思是“关于，有关”，相当于介词about / on / concerning 。下面简述一下这四个词( about，over, on, concerning)的用法及区别：
1. about (关于)较为常用，使用频率很高，不如on / concerning 那么正式。它通常指泛泛地或非正式地谈论普通的事情。例如：
We would like to talk about your family with you.
2. over (关于) 仅用在有争执或担忧的情景中。例如：
They both sides will negotiate over the border conflict.
We are greatly concerned over / about their safety.
They often quarrel over / about some trifles.
3. concerning (关于) 较为正式，并且其前必须是名词，不能是动词。例如：
He will give us a lecture concerning the global environment protection.
They had a quarrel over / about / concerning the ownership of the land.
(误) They talked concerning the present situation.
(正) They had a discussion concerning the present situation.
(正) They talked about the present situation.
4. on (关于)通常用于学术性、科技、法律等方面比较严肃的话题。例如：
This is a book on physics.
His essay on birds will appear in a magzine.

Answer 2

这句中的over是“关于”的意思，相当于on或about。
over是多义词，有多种词性、多个意思:
adv. 倒下；翻转；穿过；完全覆盖；以上；大于；再；结束；改变；完毕；仔细地
prep. 在……上面；从……上方；穿越；在……的另一边；在……的远端；从……落下；遍及；多于；在……期间；渡过；由于；关于；利用；通过；声音大于；高于；级别在……之上；优先于；超过
n. （板球）一轮投球
adj. 倒下的；折起来的；结束的；剩下的
v. 越过

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