[求助]GRE难句48题

birdie

48. Its subject（to use Maynard Mack’s categories）is　"life-as-spectacle，" for readers，diverted by its various incidents，observe its hero Odysseus primarily from without；the tragic Iliad，however，presents "life-as-experience"：readers　are asked to identify with the mind of　　Achilles，whose motivations render him a not particularly likable hero.

请问上面那个句子里面的observe的主语是什么啊？如果是subject的话，observe应该加s才对，如果是reader的话，句子结构上有点不通啊？
NN指点一二！

mike1999

observe的主语是reader,这句话提炼出来就是sth  is A for sb do sth.因为某人做某事,所以sth  is A.我的理解.

birdie

哦，是吗，还有这种用法，是偶孤陋了……

mzyzhu

Its subject（to use Maynard Mack’s categories）is "life-as-spectacle，" for（for在此可能理解为because引导一个原因转语从句要好一些。如果没有连接词，逗号分开两个带主谓宾的句子，岂不成了run on sentence） readers（从句主语），diverted by its various incidents（从句插入语），observe（从句谓语） its hero Odysseus primarily from without；the tragic Iliad，however，presents "life-as-experience"：readers　are asked to identify with the mind of　　Achilles，whose motivations render him a not particularly likable hero.