As follows (not as follow ) is the established form of the idiom,no matter whether the noun that precedes it is singular or plural:
As follows （不是 as follow ）是慣用語的構(gòu)成形式,而不管前面的名詞是單數(shù)還是復(fù)數(shù)形式：
The regulations are as follows.
規(guī)則如下所述.
as follows只是一種固定搭配,所以可以不符合語法.像這類固定搭配都是約定俗稱的,根本沒辦法從語法角度去分析,比如還有一句“l(fā)ong time no see”是“好久不見”的意思,這也是一種固定句式,不需要用語法去分析.
總之,as follows就是一種固定說法,本身的詞性不需要具體分析.具體在句子當中做的成分應(yīng)該理解成表語,因為“主語+be動詞+表語”是一種基本句子結(jié)構(gòu).