1, For what is a year but a thin sliver of history,a beat of a hummingbird's wing?
此处的 for 是起承上启下的连词，表示前面说过意思是 “因为” 后面要提到的理由。其他部分的结构如下：
在不改变上述意思的前提下，完全可以意译如下：
2. As the boy brought them a man passed alongthe street outside and seeing me waved his hand.
整句结构分析
— 主语：a man
— 并列谓语：passed along the street outside and seeing me waved his hand.
可见， seeing me waved his hand 其实就是 he, seeing me, waved his hand，其中的seeing me 是现在分词短语充当的时间状语，因此也可以改写为“when he saw me, he waved his hand.”，意思是 “他看到我的时候，挥了挥手”
For what is a year but a thin sliver of history,a beat of a hummingbird's wing?对于什么是一年，但细条子的历史，蜂鸟的翅膀一拍？As the boy brought them a man passed along the street outside and seeing me waved his hand.由于男孩带来了他们沿街外面通过一个男人，看到我挥挥手。
1,For what is a year but a thin sliver of history,a beat of a hummingbird's wing?首先，for表原因不解释；what is a year 是一个整体， but表转折，英语里有not...but...（不是。。而是）thin sliver 表示很薄，beat表示一次翅膀打动，都是意译这里。 2.As the boy brought them a man passed along the street outside and seeing me waved his hand.首先说下停顿，As the boy brought them, a man passed along the street outside and seeing me waved his hand.这里as有一边一边的意思，them 是一个代词，指示什么东西。brought一词列出来整体的时态， a man路过所以用的是passed(过去式）， 后面的see(看） a man 和see 之间有主动关系，是他看见的，所以这里用的是seeing, 后面的waved的时态适合passed时态一致
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