[問題]OG10th Q9

[kaori110]

9.Astronomers at Palomar Observatory have discovered a distant supernova explosion, one that they believe is a type previously unkonown to science.

(A) that they believe is
(B) that they believe is to be
(C) they believe that it is of
(D) they believe that is
(E) they believe to be of

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答案(E)
我ㄧ開始的解題方向
1.認為逗點之後是同位語句型,
2.(A)然後"that"是關代,所以"that they believe"是關代子句,後面句子有"is",兩個句子與只用逗號連接-- run-on sentence
3.one後直接加they 感覺省略關代--- 感覺怪異
4.所以我選B
結果
大錯特錯
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我的問題是不懂OG上說的
1."to be" --> in referring to an event that occurred long ago but has been discovered only recently
2."of a type" -->這個用法通常是怎樣的解釋，跟＂ｏｆ　ｇｒｅａｔ＂和＂ｏｆ　ｉｍｐｏｔａｎｃｅ＂　的用法的差別在哪裡
謝謝

[pimi]

請問答案E中為何有of

OG解釋如下:
A,B and D lack "of" and so illogically equate this particular explosion with the whole class of explosions to which it belongs : it is not a type but possibly one of a type.

看無~請大大解釋, 感激!!

[dibert8]

one {they believe to be} of a type:
they believe 是插句,去掉不影響句子的文法結構, to be 是跟著 believe 衍生出來,去掉 believe 就不需要 to be 了,除去了這些障眼的東東,剩下 one of a type = an explosion of a type
如果沒有 of 就變成 one a type, 就可以明顯感覺到怪怪的,因為 one =/= a type, 兩個不能同位.

[dibert8]

1."to be" --> in referring to an event that occurred long ago but has been discovered only recently
2."of a type" -->這個用法通常是怎樣的解釋，跟＂ｏｆ　ｇｒｅａｔ＂和＂ｏｆ　ｉｍｐｏｔａｎｃｅ＂　的用法的差別在哪裡

1. to be 是跟著 believe 而來, believe to be 是相對於 believe to have been 前者表示信仰 (i.e. 相信是這樣),後者表示推測 (i.e. 判斷是這樣).再者, to be 在此沒有時態, (i.e. 同主要子句/現在完成式),若用 is 表示現在,失掉了完成式的意思,就像 OG 說的那樣:
In the context of this sentence, the infinitive to be is more appropriate than the limited present-tense is in referring to an event that occurred long ago but has been discovered only recently.
2. of 表示"屬於": of a type "屬於"一個類型; of importance "屬於"重要.