ffice" />1. In the mid-1920’s the Hawthorne Works of the Western Electric Company was the scene of an intensive series of experiments that would investigate changes in working conditions as to their effects on workers’ performance.
(A) that would investigate changes in working conditions as to their effects on workers’ performance
(B) investigating the effects that changes in working conditions would have on workers’ performance
(C) for investigating what are the effects in workers’ performance that changes in working conditions would cause
(D) that investigated changes in working conditions’ effects on workers’ performance
(E) to investigate what the effects changes in working conditions would have on workers’ performance
（B）
1.E中除了what the effects 与B不同外有什么区别，主要想问分词和infinitive的区别
再看一题：
1. Since chromosome damage may be caused by viral infections, medical x-rays, and exposure to sunlight, it is important that the chromosomes of a population to be tested for chemically induced damage be compared with those of a control population. (A) to be tested for chemically induced damage be compared with (B) being tested for damage induced chemically are compared with (C) being tested for chemically induced damage should be compared to (D) being tested for chemically induced damage are to be compared to (E) that is to be tested for chemically induced damage are to be comparable with （A）可以从it is important that 看出要用be compared with， 2.若B改成being tested for damage induced chemically be compared with对吗？ 3.这里induced chemically 放在前面和后面意思有什么改变吗？
小雪MM. 不定式表示目的, 一次性动作(自认为太绝对); 分词可以当伴随状语, 和起定语从句的作用(强调重复性动作, 自认为不要作为判断选项的依据)fficeffice" />
本题的关键还是在于对句子意思的理解:
B的中文意思是: 研究一种效果, 那就是工作条件的变化对工人表现的影响.
E的中文意思是: 研究工作条件变化的效果对工人表现的影响.
这里的效果是条件变化对工人表现, 而不是条件变化的效果.
之所以选b的原因是因为e里面的意思表达不清楚，实际的句子结构是这样的;
（changes in working conditions） would have （what effects） on workers’ performance
小雪 偶可以举一个例子: I have two letters to write. 这里就带有将来的意思.
DISCUSSION TO BE WELCOMED!
(E) to investigate what the effects changes in working conditions would have on workers’ performanc
不应该是目的状语
1，逻辑主语成了the Hawthorne Works，无法理解。
2，如果是目的状语，可以改成：In order to investigate, the Hawthorne Works was the scene.主句是系表结构，可以用目的状语吗？
只能是：某人为了什么，干什么。不能是：某个东东为了什么，是什么。
另外，分词作状语一般要用逗号隔开。
请指正。
又看了不定式做定语的用法，
不定式和以前讲过的非谓语动词中的分词和动名词一样，还可以做定语。例如，I have something to tell you. （我有事要告诉你。）to tell you做定语修饰something。不过，我们要注意，不定式作定语时有点特别，它一般放在被修饰的名词或代词之后。比如我们要说这是学英语的好机会，那么学英语就是机会的定语，应该用不定式，并放在机会的后面。It's a good chance to learn English."明天他有一个重要的会议要参加。"He has an important meeting to attend tomorrow.
许多形容词、副词、过去分词作表语时，后面也带有不定式，作状语。常见的这类词有glad、sorry、proud、afraid、ready、difficult和good等等。如：He's always be ready to help others.（他总是乐于助人。） The river is good to swim in. （这条河是个游泳的好地方。） English is not difficult to learn. （英语并不是很难学。）
看来势我的概念弄得不清楚，很抱歉。
(1)一般说来动名词所表示的动作在意义上是比较抽象的、一般的，时间概念不强，不是指某一次的动作；而动词不定式所表示的动作则往往是具体的一次行为。例如：
1）I like swimming, but I don’t like to swim today.
2) They prefer staying indoors when the weather is cold.
3) Would you prefer to stay at home this evening?
(2)动词不定式的逻辑主语，常常是句子的主语或句中的某个词；而动名词的逻辑主语可能是句子主语或句中某个词，也可能是泛指一般人物，在句子里是找不着的。例如：
1）I hate to be sitting idle. (我不想闲坐着。)（指自己）
2）I hate saying nothing at a meeting but gossiping afterwards. (我不喜欢开会不说会后乱说。)（可能指自己，也可能泛指一般人）
(E) to investigate what the effects changes in working conditions would have on workers’ performance.
偶觉得E有一个最大的问题是what引导的句子没有谓语。
changes in working conditions would have on workers’ performance是定语从句修饰effects，由于先行词在从句中做宾语，所以可以省略that.
这道题我排除了B，因为investigating the effects that……是现在分词短语做定语修饰experiments，-ing分词做定语表示主动，但是experiments只能是被用来做investigate的手段，它自己不能主动去investigate，所以我觉得用-ing形式在逻辑上有点别扭。
那位牛牛能批驳一下我上面的想法？你们是怎么理解experiments和investigate之间的逻辑关系的？
这是个误区，experiments可做investigate的逻辑主语，如：These experiments investigate air pressure。当然experiments也可被用来做investigate的手段。两种表达都可接受。
(E) to investigate what the effects
changes in working conditions would have on workers’ performance.
偶觉得E有一个最大的问题是what引导的句子没有谓语。
changes in working conditions would have on workers’ performance是定语从句修饰effects，由于先行词在从句中做宾语，所以可以省略that.
***************************
为什么总有说E的what从句缺少谓语呢?我就不觉得啊. 如果 effects changes作为主语呢?不就是不缺谓语了?
to investigate what the effects changes (主语)in working conditions would have(谓语) on workers’ performance..
是不是还是需要从不定式的用法来寻求突破解释呢??
不指望回答了.....
(1)一般说来动名词所表示的动作在意义上是比较抽象的、一般的，时间概念不强，不是指某一次的动作；而动词不定式所表示的动作则往往是具体的一次行为。例如：
1）I like swimming, but I don’t like to swim today.
2) They prefer staying indoors when the weather is cold.
3) Would you prefer to stay at home this evening?
(2)动词不定式的逻辑主语，常常是句子的主语或句中的某个词；而动名词的逻辑主语可能是句子主语或句中某个词，也可能是泛指一般人物，在句子里是找不着的。例如：
1）I hate to be sitting idle. (我不想闲坐着。)（指自己）
2）I hate saying nothing at a meeting but gossiping afterwards. (我不喜欢开会不说会后乱说。)（可能指自己，也可能泛指一般人）
谢谢！！
另外，补充一点在薄冰语法书上看到的关于不定式和现在分词做后置定语式的区别：区别主要表现在两个方面
1）时间上的区别：不定式着重表示未来，现在分词表“当时或正在进行或经常”
2）语义上的区别：不定式表示潜在的可能与结果；现在分词表示事实或真实情况
我在想这的experiment后面用investigating 来表示当时的一个事实
大家看呢？？
有道理
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