Time 句構解析請教

Question

句子如下:
When you write about technology, you see a lot of demos, demo
問題1. being the industry term 問題2.for when an executive
demonstrates a new product for an audience, usually with the aid
of a nervous tech-support guy.

問題1.: demo 後面為什麼要用being

問題2.: for 後面接 when 的副詞子句　如何分析

出自Time　中文版　８月號

謝謝大家

Answer 1

When you write about technology, you see a lot of demos, demo being the industry term for when an executive
demonstrates a new product for an audience, usually with the aid
of a nervous tech-support guy.
當你要寫有關科技的東西時，你會去看許多展示﹙demo﹚，展示是一種企業術語，所指的是業務執行者向聽眾展示一項新產品，通常還有一個崇拜科技﹙支持科技﹚的神經質的傢伙在旁協助。
﹙這個協助者，可能可以藉著他「神經質」的敏感態度，呈現出或者誇大顯示該產品的優良特性，例如「哇，完全沒有污垢耶…」﹚。


原句應可改成：
When you write about technology, you see a lot of demos, and demo is the industry term for the activity in which an executive
demonstrates a new product for an audience, usually with the aid
of a nervous tech-support guy.
所以，
1. 原句的 demo being... guy，也可說是從 and demo is...guy這個句子(連結詞+句子)變來的。將連接詞(and)刪去，保留主詞(此主詞是demo，與另一句的主詞you不同)，主詞之後的動詞改成分詞(變成being...guy)。這種放在「主詞」之後分詞，可稱為「獨立分詞片語」。
2.原句的when an executive...guy，似乎是非正式的﹙informal﹚文法用法，如果改成the activity in which an executive...guy則是比較正式的﹙formal ﹚用法。因為 「when+子句」這個副詞子句，放在for後面顯然不太合正式文法﹙for後面本來應該放名詞﹚。
關於「when+子句」的這種「非正式」用法的問題，可參考
http://www.answers.com/when
此網頁的相關說明略譯如下：
在非正式用法中，，when常常放在be動詞之後，以完成某定義語句：A dilemma is when you don't know which way to turn. 雖然有用﹙有溝通的效用﹚，但是這種結構廣被視為不正確或不符合正式說法。要改成正式用法，這個定義語句應該把is when刪去，然後補上屬性的名詞﹙generic term﹚，此名詞之後可以用限定形容詞子句來修飾(A dilemma is a situation in which you don't know which way to turn) ，或者改寫成含有「when+子句」這種副詞子句的新句子 (You are in a dilemma when you don't know which way to turn).
上面所說的when「放在be動詞之後」，和原句「放在for之後」有類似的情形﹙都放在一個應該當名詞或形容詞的位置﹚。

Answer 2

版主您好:

看了杰陽大大的回答, 才瞭解您的問題(見笑了).

關於第一個問題(being的由來), 杰陽大大已經說得很清楚.

2007-08-15 11:21:44 補充：
至於您說: "for後面接when的副詞子句"
這是誤解, 這個when所引導的是一個名詞子句, 當成介系詞for的受詞.
杰陽大大的說明是來自外國正式網站的資料, 自然有其參考價值. 但是這種用法的確是相當普遍的, 而且也不限於when. 而在正式的場合(網頁)也屢見不鮮.

2007-08-15 11:22:28 補充：
Make the most of special deals, but remember to have a plan of action for when the deal runs out.

http://72.14.235.104/search?q=cache:0O5uqVqwlfoJ:news.bbc.co.uk/2/hi/business/4441896.stm+%22for+when+the%22,+bbc&hl=zh-TW&ct=clnk&cd=2&gl=tw

2007-08-15 11:22:42 補充：
Are we ready for when the oil runs out?

http://www.guardian.co.uk/comment/story/0,3604,1242460,00.html

2007-08-15 11:23:00 補充：
其他的例子:

In many ways, this community accelerated far ahead of where the newspaper was.

http://72.14.235.104/search?q=cache:IHoFecPh7tcJ:www.usatoday.com/life/columnist/mediamix/2003-09-14-media-mix_x.htm+%22of+where+the%22,+cnn&hl=zh-TW&ct=clnk&cd=5&gl=tw

2007-08-15 11:24:16 補充：
Over the last 24 hours I've heard nothing but people talking about why the bridge collapsed.

http://72.14.235.104/search?q=cache:4IvwS6BiYYAJ:www.cnn.com/CNN/Programs/anderson.cooper.360/blog/2007/08/thinking-about-families.html+%22about+why+the%22,+cnn&hl=zh-TW&ct=clnk&cd=8&gl=tw

2007-08-15 11:31:18 補充：
至於杰陽大大所舉的例子:
A dilemma is when you don't know which way to turn.
whenwhen所引導的名詞子句當成主詞dilemma的補語.

2007-08-15 11:31:54 補充：
CNN有類似的例子:
October is when the crowds have dwindled and when the elk put on a concert of sorts.

http://72.14.235.104/search?q=cache:vOrbS_RZIi0J:edition.cnn.com/2006/TRAVEL/ADVISOR/09/21/beat.the.crowds/index.html+%22is+when+the%22,+cnn&hl=zh-TW&ct=clnk&cd=6&gl=tw

2007-08-15 11:32:09 補充：
所以這種句型的使用應該不必忌諱吧.