请帮我分析一下下面这句话的语法结构，谢谢！这是现代大学英语第三册第一课里面的一句话。

Question

During the course I had come to realize that while my world was expanding and new options were opening for me, my father, who was in his sixties, was seeing his world shrink and his options narrow.
was seeing 后面的部分怎么理解，是宾语从句吗？

Answer 1

During the course 是时间状语，
I had come to realize that ... 是主句部分，I 主语，had come to realize 谓语，that 引导宾语从句。
现在分析 that 宾语从句内部的结构。
while 连词，表示对比，while my world was expanding and new options were opening for me,可以看作是并列句，这里主要的用法是两者对比，所以看作并列句好一些，但也有人把它理解为时间状语从句，因为这里的 while 翻译成“当......的时候”也可以。在 while 分句中，用 and 连接了两个并列句。
my father, who was in his sixties, was seeing his world shrink and his options narrow 这部分看作为宾语从句中的另一个并列句，与 while 分句并列。也有人说 while 部分是时间状语从句，这部分是主句，是在宾语从句内部作主要部分。其中的 who was in his sixties 是定语从句，修饰 my father。was seeing 是该分句的谓语，用了过去进行时。his world 宾语，shrink 动词不定式省略 to 作宾补。his options 宾语，narrow 宾补。最后的 his world shrink and his options narrow 是并列的复合宾语（宾语和宾补合在一起就叫复合宾语）。

Answer 2

在此期间，我已经意识到我的视野很开拓，有利于我的机会也很多，然而，我的六十几岁的父亲，（跟我的感觉相反），他觉得世界很小，机会也很少

During the course 是时间状语

realize后面接一个宾语从句

while，然而

my father 后面跟两个定语从句

你可以把was seeing 看成是我父亲的并列的定语从句，本回答被网友采纳

Answer 3

在此过程期间，我已意识到我的世界在不断的扩展，新的选择不停地向我招手，而我的父亲，一位六十多岁的老人见到的是，他的世界在变小，他的选择面不大了。
1. I had come to realize 这是主从复合句中的主句，其中I 是主语， had come to realize 是谓语 ，that 引导的是宾语从句，作 had come to realize 的宾语。
2.宾语从句that while my world was expanding and new options were opening for me, my father, who was in his sixties, was seeing his world shrink and his options narrow中while my world was expanding and new options were opening for me, 是个比较状语从句，主句是my father, who was in his sixties, was seeing his world shrink and his options narrow，而在主句中又包含了一个who was in his sixties非限定性定语从句，修饰, my father。

Answer 4

During the course（状语） I（主语） had come to realize（谓语） 【that（引导宾语从句） while my world was expanding and new options were opening for me, my father, 注意and是并列句】【who（引导定语从句，修饰his father） was in his sixties, was seeing his world shrink and his options narrow.注意，and是并列句哦】

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Answer 5

基本结构是 i had come to realize that...
that后面的都是realize的宾语从句
while引导的是个状语从句，是我的情况跟爸爸的情况的对比
my father后面还有一个who引导的非限制性定语从句追问

was seeing 后面的部分怎么理解，是宾语从句吗？

追答

see his world shirnk 是动词+宾语+宾补（就是初高中时老师常念叨的see sb do sth，这个其实是see sb to do sth，但是通常省略了to，叫做省略to的不定式）
（see） his options narrow同样也是动词+宾语+宾补（这个是形容词做宾补）
不是从句，如果是从句的话，你会在was seeing后面看到his world shrinks 或者his world was shrinking之类的，因为his world 是第三人称单数啊，从句中一般现在时态必须加s的。
楼下那个13级的说的不对，没有什么并列句。
这句话里还有一个比较重要的点就是那个while，高中时老师肯定讲过while可以引导两种情况的对比，比如tom likes action movies while his wife loves love stories.