1 instead of在本句中并不是介词用法，而是用如连词，并列二个as分句。通常instead of是由副词instead 和介词in构成的复合介词，英文的释义为rather than。作为复合介词后接名词或动名词结构，instead of 和rather than可以互换使用。但rather than还可以用作准并列连词，连接相等的句法结构，例如并列二个不定式或谓语动词。有人把instead of 也当做rather than使用，即用作准并列连词，例如本句instead of 后接as 分句，而as分句是不可以作介词的宾语的。对于instead of 被用作并列连词，部分人认为是语法错误，但也有人接受这种用法，认为这是非正式语体。下面是the freedictionary对于instead of 用作连词的使用说明：

conj.

Rather than.

Usage Note: Traditionally, instead of is a preposition used like rather than, and the two constructions are often used interchangeably: We had spaghetti instead of (or rather than) pizza. The constructions are frequently used with participles in comparisons in which the alternate entity is a main verb: Instead of (or rather than) taking the bus, we walked to the theater. Rather than has a further use as a conjunction when the comparison is of one main verb with another: We took the bus rather than walk. In these constructions, instead of is sometimes used as well—something that, under the word's traditional categorization as a preposition, would seem a grammatical error. But in our 2005 survey, 63 percent of the Usage Panel allowed the sentence We would have liked to buy instead of rent, but prices were just too high. Writers should bear in mind, however, that this use of instead of is somewhat informal.

2 通常语法书认为as引导比较分句时为从属连词，在从句中不做成分，但as分句常省略相应的成分。本句中的二个as比较分句被用作pictures的宾语补足语。第一个as分句省略了sees的宾语补足语，第二个as分句省略了are后的表语，as并不在分句中做成分。当然你也可以把as分析为比较替代词，as不但引导比较分句，同时还在比较分句中充当分句成分。按照这种分析，as就是第一个as分句中的宾补，第二as分句中的表语，分句没有省略成分。