As long ago as the fourteenth century an Englishman made a d

題目：

As long ago as the fourteenth century an Englishman made a discovery 這裡兩個as 分別是什麼用法
As long ago as the fourteenth century an Englishman made a discovery
都是副詞 表大約的意思
as fourteenth century 修飾 long ago ,
As long ago 修飾謂語

解答：

as adj/adv as... 與...一樣...
long ago 很久以前 adv
與十四世紀一樣久遠 就是 早在十四世紀的意思
as long ago as ... 翻譯成 早在...
再問： as fourteenth century 修飾 long ago , As long ago 修飾謂語 這種說法是不是不對啊?
再答： as...as意爲"和……一樣"，表示同級的比較。使用時要注意第一個as爲副詞，第二個as爲連詞。其基本結構爲：as+ adj./ adv. +as （As long ago as the fourteenth century ）an Englishman made a discovery 括號裡面就相當於一個時間狀語