请高手指点!!这句英文应该分析理解？这里怎么出现了两个has been ?请尽量详细，以便我能举一反三感谢!

Question

His contribution to all areas of company activity in which he has been involved have been much appreciated.
他在公司各方面错综复杂的事务所做出的贡献，得到欣赏？？？应该是他的贡献得到欣赏，只是什么样的贡献加了一个从句。这叫什么从句？in which一般怎么用在从句中呢？
请!!!!!!给一个正确的翻译!!!!!

Answer 1

1.His contributions to all areas of company have been much appreciated.
He has been involved in company activity.
两个句子一分开就清楚了，呵呵。他的贡献得到了欣赏！他所参与的所有公司行为。
具体contribution可不可数可以暂时不去理会，看具体说明情况了，老外用一些本来不可数的的名词加上复数的时候不是没有。语言规则就是用来打破的，因为表达需要，不规则情况说明有额外的意义需要传达，在引用所谓的语法规则之前首先用用脑子想想，语言是活着的。
2.定语从句；
3.这种在名词后面接一个限定词然后引起新的从句的特征在英语里面叫“recursiveness”连续性，属于英语语言creativity创造性的表现之一。当然这是语言学角度解释，咱们可以不用这么去记，而是适应和习惯这种绵延不绝的语流特点，这是汉语单音节分散性所不具备的。举个列子：that night when I was having the meal which was cook by my mother who just left home for an important bussiness appointment that made everyone in her company hectic...

Answer 2

简单点说
His contribution has been much appreciated.这是主干。
to all areas of company activity是contribution的定语
in which he has been involved=which he has been involved in，是cativity的定语。
只不过恰巧从句和主句的谓语时态都是完成时而已。本回答被网友采纳

Answer 3

句子的骨干成分His contribution have（have应改为has才对，contribution不可数） been much appreciated.这是被动语态的现在完成时态；
主语 contribution 的定语：to all areas，这是介词短语作定语；
activity 的定语：in which he has been involved ，这是个定语从句。 这个定语从句介词in前置了，原来语序为 which he has been involved in （activity）。。。

Answer 4

第一个是in which he has been involved作为一个断句，是company activities的定语，是指他参加的公司的活动，而第二个是整句his contribution to all areas of company activity have been much appreciated的谓语动词，是指他为公司各类活动做的贡献都获得了称赞
大概就是这样了 有问题再补充

Answer 5

第一个 has been 修饰的是 activity 第二个 have been 修饰的是 contribution 提取主干的话 应该是 His contribution have been much appreciated. 中间那一大堆是修饰用的 有个正规的句式名称 不过我给忘了 不好意思啊 希望对你有帮助

Answer 6

句子翻译：他对公司各方面活动所做出的贡献得到了赞赏。
这里第一个has been 是He has been involved in all areas of company activity.
第二个has been 的主语是his contribution，还原句子，应该是His contribution has been much appreciated.
in which 在这里是定语从句，用in which 是因为后面是involve ，involve in 是参与，参加的意思