I am very pleased at your having been chosen a member of the school volleyball team.不求翻译,I am very pleased at your having been chosen a member of the school volleyball team.这是一个什么句（简单句OR复杂句）.your having been chos

I am very pleased at your having been chosen a member of the school volleyball team.不求翻译,I am very pleased at your having been chosen a member of the school volleyball team.这是一个什么句（简单句OR复杂句）.your having been chos
I am very pleased at your having been chosen a member of the school volleyball team.
不求翻译,
I am very pleased at your having been chosen a member of the school volleyball team.
这是一个什么句（简单句OR复杂句）.
your having been chosen a member of the school volleyball team和I am very pleased at 的关系...
为什么不是说I am very pleased at you having been chosen to be a member of the school volleyball team...

I am very pleased at your having been chosen a member of the school volleyball team.不求翻译,I am very pleased at your having been chosen a member of the school volleyball team.这是一个什么句（简单句OR复杂句）.your having been chos
1.这是一个简单句,不是并列句,也不是复合句.
主语：I
谓语：系表结构am bery pleased
（原因）状语：介宾短语at your having been chosen a member of the school volleyball team.
翻译：对于你（已经）被选中称为校排球队的一员,我感到很高兴/满意.
2.此句后面如果说成you having been chosen to be a member of the school volleyball team,也是正确的.
其中的you是人称代词宾格,而your是形容词性物主代词.
该结构在语法上被称为动名词的复合结构.如果它在句中充当介词at的宾语,既可以用“人称代词宾格 + doing sth”,也可以用“形容词性物主代词 + doing sth”.
而having been chosen to be a member of the school volleyball team是动名词的被动完成式,即强调you和choose之间的被动关系,还强调be chosen该动作发生在谓语动词am very surpirsed之前.
再如：I don't know you/your having been laughed at by him.
我并不知道你（曾经）被他嘲笑过.

一般来说，复杂句都是由连词或引导词连接的句子，我们熟知的类型有名词性从句，定语从句，状语从句。这句话虽然是由两个句子构成，但是后者{ your having been chosen a member of the school volleyball team} 充当的是介词at 的宾语成分，构成一个介宾结构。所以，这应该是一个简单句。如果改成I am very pleased that you h...

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一般来说，复杂句都是由连词或引导词连接的句子，我们熟知的类型有名词性从句，定语从句，状语从句。这句话虽然是由两个句子构成，但是后者{ your having been chosen a member of the school volleyball team} 充当的是介词at 的宾语成分，构成一个介宾结构。所以，这应该是一个简单句。如果改成I am very pleased that you have been chosen a member of the school volleyball team.那就是复杂句了。
另外，这里不能用you，我只能说，根据语感来判断了。

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这肯定是一个简单句。I am very pleased at 。。。而不是that。。。
至于 you having been chosen to be a member表达的是你已经被选拔即将成为成员（还没有成为）的含义。
而your having been chosen a member表达就是你已经被选拔成为某成员了。