比較級文法問題：as BeV+S ????

連接詞as與such, the same, as或so等字搭配使用時，與關係代名詞一樣兼具代名詞的功能，因此稱為［準關係代名詞］。

Thompson was as good a basketball player as has ever played the game.
第二個as是準關係代名詞，as = a basketball player

We will give the audience such a show as has never been seen before.
as = a show

The girl wore the same red dress as her mother did.
as = the red dress

以上說明及例句取自LiveABC編＜英文文法完全攻略p.281

Taipei is approximately eight times as far from Kaohsiung as is Tainan.
是錯誤的，因為第二個as如果當［準關係代名詞］用，在as ... as之間沒有名詞可當其先行詞。
所以本句只能寫成Taipei is approximated eight times as far from Kaohsiung as Tainan.
你的題庫有問題，未提供正確答案給你選。

類似的n times as ... as句子如下（取材自趙振才編＜英語常見問題大詞典>pp.95-96）：
This airplane flies two times as fast as that one.
He has five times as many books as you.
He is twice as strong as he was.（與前面的is時態不同，所以才保留was )
I have three times as much as I want.（want與have不同，才保留）




2014-01-17 11:50:06 補充：
Ｗe have undertaken to provide higher education for as many people as want it.
關係子句as want it修飾people，as是關係子句的主詞。many前面的as是副詞。

Are you thinking the same thing as I (am thinking)?
這個例句裡的as先行詞是thing，所以也可以用關係代名詞which，而不用as。

以上取自綿貫陽著＜新觀念英文法＞p.381準關係代名詞

Taipei is approximately eight times as far from Kaohsiung __as is Tainan_____.

When you use "as" you cannot use "than". As ... as is used together. E.G. As far as I am concerned. it makes no difference. If you want to use a comparison, then Taipei is approximately eight times farther from Kaohsiung than Tainan.

因為as far的關係，所以後面要選as

你可以參考 http://www.ptt.cc/man/Eng-Class/D5A1/M.1131365512.A.6BE.html

如果你要選比較級，前面應該要是 farer than....

我沒有辦法說的很清楚，所以只發表意見，等高手解答嚕