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题库 / Prep2007E1-SC-64
Recently documented examples of neurogenesis, the production of new brain cells, include the brain growing in mice when placed in a stimulating environment or neurons increasing in canaries that learn new songs.
the brain growing in mice when placed in a stimulating environment or neurons increasing in canaries that
mice whose brains grow when they are placed in a stimulating environment or canaries whose neurons increase when they
mice's brains that grow when they are placed in a stimulating environment or canaries' neurons that increase when they
the brain growth in mice when placed in a stimulating environment or the increase in canaries' neurons when they
brain growth in mice that are placed in a stimulating environment or an increase in neurons in canaries that
https://forum.chasedream.com/thread-254588-1-1.html
That 可以修饰mice引导定语从句
而when 不行，when引导定语从句只能修饰时间。如果理解成状语从句，这种情况从句是不能省略主语的。因为从句主语与主句主语不同。
这里压根就没有逻辑主语的事，因为没有不定式或者that引导的宾语从句。
canaries 是一种鸟。。。
a, placed 的动作发出者是谁？growing 和 increasing有自己的名词形式growth和increase
b, example应该包含的是两件事或者两个结果，而不是两个具体名词mice和canaries
c, they的指代对象只能是mice's brain，而不能指代mice, 后面的they同理，名词所有格不可以被指代
d，placed的动作发出者不明，growth? 还是mice?,后面的they找不到指代，错误同c
D和E，状语和定语的差异。
when只有修饰时间概念的时候才能作定语。
"they" is totally wrong in (d). it would automatically refer to "neurons", since "canaries' " is possessive and therefore ineligible to be the referent.
similarly, (c) has incorrect pronouns (the first "they" would automatically be "brains", and the second would automatically be "neurons").
(b) has ambiguous pronouns.
if you say "when + PAST PARTICIPLE", then this automatically applies to the SUBJECT of the clause to which it's attached.
if i say
iron accumulates rust when submerged in water
then it's the iron, not the rust, that's submerged in water.
this strikes choice (d), since the SUBJECT is "recently documented examples", not "mice" as required.
And the other thing wrong with A, B, C and D is "when placed in a stimulating environment" - it sounds like they are referring only to the time that the mice are in the stimulating environment - but the brain growth is permanent. It doesn't shrink back down once the mice are no longer in the stimulating environment. Ditto for the increase in neurons in the canaries.
Tough one. "examples of neurogenesis include" - so the examples should lead off with whatever the actual thing is that indicated neurogenesis. The mice aren't the example - the example is the brain growth. That eliminates B and C. A also breaks parallelism.
分词状语,主语the production (of new cells), 谓语include brain growth in mice +限制性定语 or (平行触发词） an increase in neurons in canaries+限制性定语从句
C 错在mice brains 和 neurons不能是 新细胞的production
A 哪裡不平行 有人可以解釋一下嗎
用growing 和 increasing 并不科学， 应该用growth 和increase ， 这才是名词形式。
when placed中主语是brain，而他的逻辑主语应该是mice
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看了半天觉得B也没问题呀，whose不仅可以用来指物，也可以用来指人呀，并且句式上也是平行的，难道仅仅是因为when用错了，必须要用that吗？
B的最大问题是改变了句子意思。原句的意思是example of neurogenesis包含什么。而neurogenesis指的是the production of new brain cells。所以example包含的应该是和脑细胞相关的，而B直接给出的是两种动物。所以意思不对了。
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根据平行来看，首先排除A,D
B,C,E,中，感觉这道题想要通过举例一些mice和canaries来说明问题，哪一些呢？要用定语从句来修饰，when并引导定语从句，只是伴随状语，并不能说明本质。
when引导状语从句主语是主句主语 警惕默念一万遍
伴随状语是它修饰的主句的主语，不是每个when引导的从句都是和主句主语相同的。
when+分词结构，就是做伴随状语吧？
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D: when placed in 和 when they 不平行；且 in mice 和 in canaries' neurons 不平行，而E项中，in mices 与in canaries 平行
此题的关键是理解neurogenesis的意思是神经形成！这样的话，唯一合理的搭配是E，brain growth和an increase in neurons
能不能理解为BCD中的they本来应该指代是小鼠或者金丝雀，实际指代brain cells,所以排除？
就是说mice后面如果跟定语的话，不能用when来修饰，所以when一定修饰的别的东西。
可以这么认为，因为when在做定语从句的关系词的时候，肯定是要修饰时间的。
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E选项提主干后，examples include brain growth or an increase。【例子】包括【大脑生长】或【神经元增加】 。
when在此题中引导的是状语从句。
e选项看不懂那个or是什么，include不是用and吗？为什么是or啊？
首先吧，这点不太重要，因为五个选项在这个地方都是一样的。至于为什么用or，我想是因为，由于老鼠和金丝雀是两种不同的动物，它们的神经形成的情况是不同的。而examples里包括老鼠的或者金丝雀的，虽然两者不同，但神经形成的原理一样，包括哪个都可以。这里的or和and的意思差不多，只是表示老鼠和金丝雀的这两件事不同罢了。
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D选项用两个when引导的状语从句修饰the brain growth in mice和the increase in canaries' neurons ，还挺平行挺通顺的。想知道D选项哪里错了，，是when placed in a stimulating environment 缺成分吗？如果改成when they are placed in a stimulating environment 是不是就对了呢？另外，D选项里定冠词the用得不对吗？
D中最明显的错误就是你说的这个when引导的状语从句。when placed in a stimulating environment or the increase in canaries' neurons是伴随状语对吧，那么这个place的逻辑主语就只能是它最近的句子的主语啊。但逻辑上，被放在某个环境中的，肯定是mice。
一定要注意，多关心主干的变化，不要关心小词的变化。
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