白勇书上定从/状从那章的一道题！！！！！！谢谢

ljwqlcl881703

The airline industry is cutting its lowest discount fares more widely, more substantially, and earlier this year than it normally does at the end of the summer, a time when travel usually decreases and the industry uses some lower fares to attract passengers.
A during which travel usually decreases and the industry some lower fares for the attraction of
B during which travel usually decreases and therefore the industry will use some lower fares for the attraction of
C in which travel usually decreases and in which the industry therefore use some lower fares attracting
D when travel usually decreases and the industry uses some lower fares to attract
E when travel usually decreases and therefore the industry will use lower fares for the attraction of
答案是D
我想问下 when引导的是状语从句还是定语从句？a time when 书中说的是定从的一种搭配。但是有分析说这是状从！
刨去后面use搭配和attract动词性名词问题 用介词加which 为啥不可以？是固定搭配的习惯用法么？a time 必须跟when？
在寻找以前的帖子的时候有人回复别人这个问题时说 划线的and连接的两个不完整主谓 所以可以看成a time when...and when... 后面一句赞同 前面一句这不是完整的主谓么？/http://forum.chasedream.com/GMAT_SC/thread-2906-1-1.html?SearchText=句子并列 / ==>> 之前那篇帖子
瞬间句子结构又混淆了~~~
求好心大牛帮忙解答下 不胜感激！

TerraceHo

The airline industry is cutting its lowest discount fares more widely, more substantially, and earlier this year than it normally does at the end of the summer, a timewhen travel usually decreases and the industry uses some lower fares to attract passengers.

（1）a time是修飾at the end of the summer的appositive，when-clause是修飾a time的限定性定語從句。
（2）a time when...and (when)...第二個when可以保留/省略。
一般如果並列兩個從句的先行詞是一樣的話，後面那個省略沒問題；如果是不一樣的話，後面的一定要保留

kiwifoodtown

The airline industry is cutting its lowest discount fares more widely, more substantially, and earlier this year than it normally does at the end of the summer, a timewhen travel usually decreases and the industry uses some lower fares to attract passengers.

（1）a time是修飾at the end of the summer的appositive，when-clause是修飾a time的限定性定語從句。
（2）a time when...and (when)...第二個when可以保留/省略。
一般如果並列兩個從句的先行詞是一樣的話，後面那個省略沒問題；如果是不一樣的話，後面的一定要保留

！-- by 会员 TerraceHo (2012/12/7 12:28:53)

很好的解释！

ljwqlcl881703

这俩明白了 但是第二个问题  用介词+which 引导的定从 修饰a time 不可以么？

TerraceHo

这俩明白了 但是第二个问题  用介词+which 引导的定从 修饰a time 不可以么？

-- by 会员 ljwqlcl881703 (2012/12/7 17:12:07)

定從中，先行詞表示時間的話，可以用when/in which

ljwqlcl881703

这俩明白了 但是第二个问题  用介词+which 引导的定从 修饰a time 不可以么？

-- by 会员 ljwqlcl881703 (2012/12/7 17:12:07)

定從中，先行詞表示時間的話，可以用when/in which

-- by 会员 TerraceHo (2012/12/7 19:49:41)

那我把D答案中的when 替换成in which也是可以的呗

TerraceHo

【from manhattan】
The pronoun when can be used to modify a noun event or time, such as period, age, 1987 or decade. In these circumstances, you can also use in which instead of when.