a is to b what c is to d是什么意思(介词用法最全总结)
1. A is to B as C is to D 1. The tail is to fish just as the rudder is to a ship.
2. Park are to the city as lungs are to the body.
3. An individual is to a country what a screw is to a machine.
这是现在正常的结构，as=just like; 数学试卷上的数字比例关系，就常用此型
2. What C is to D, A is to B4. What sculpture is to a block of marble, education is to the soul.
5. What the blue print is to the builder, the outline is to the writer.
6. What Newton was to mechanics and Darwin to biology, Freud was to psychology.
这也是现在正常的结构
01. What C is to D, (so) A is to B. / 02. As C is to D, (so) A is to B.
这2句要这个so么？
01. 不要，what≠（just）as ; 02. 要，用so构成，(just) as … so : As C is to D, so is A to B.
在句型2里面，so虽有点多余，但有强调性质，犹如just as比as语气要强一样.
3. A is to B what C is to D7. Air is to us what water is fish.
8. Reading is to the mind what food is to the body.
9. Railway is to transportation what blood is to a man’s body.
这个属于比较古旧的结构，比如句子7，语法是上= To us, air is what water is fish.
句子3很容易变出句子2
4. What C is to D, that A is to B （X）10. What the gun is to a fighter, that the pen is to a writer.（X）
11. What food is to man, that manure is to crops.（X）
12. What lungs are to the body, that parks are to the city.（X）
这个基本是属于胡搞的结构，不要用
有些人认为可以用 “左移位句” 来分析这种结构，不管怎么分析，都没有必要。
5. A does for B what C does for D10. Leaves do for plants what lungs do for animals.
11. Letters do in writing what sounds do in speaking.
12. The eagle is among birds what the lion is among beasts.
6. As C is to D, so A is to B （OK）16. As two is to three, so four is to six.
17. As food is to the body, so a book is to the mind.
18. As the touchstone tries gold, so gold tries virtue.
19. As you like music, so I like poetry.
20. As a man lives so he dies.
7. As C is to D, so is A to B （X）21, As sound is to the tape recorder, so is light to the dream.
22. As words are to an author, so are color line mass space and texture to a painter.
如何用左移位句来分析该句结构？
What light is to the eye, that knowledge is to the mind.
注：
话题句，直接把句中成分搬出去
The beautiful girl, Tom married <> last year.
左移位句，把句中成分移出后，在原位置填不上一个相应代词
The handsome man, he married a beautiful girl last year.
(1)
题目这句子现在是不可能用的，但作为古代戏剧中，表现那种浮夸场景或许有.
"that" 可以是代词，也可以是限定词，但这里knowledge却不是that所限定的词.
"that" 指代前面整个句子, 是左移位句的补位词，即that = what light is to the eye.
我们称这种what-从句为free relative clause, 它通常是名词短语。
(2)
正如前面所述，现代英语中，下句还是可以见到的，
Knowledge is to the mind what light is to the eye
即Knowledge is what light is to the eye to the mind
利用它，可变换出本题的题目句子。
(3)
原句What light is to the eye, that knowledge is to the mind.
= What light is to the eye, knowledge is
把前面的短语塞回主句，
= knowledge is < what light is to the eye> to the mind.
它与(2)是一样的，这里利用了所谓的左移位句知识。
实际上，国外的确有人这样变换。
但更多的人却认为这种变换根本就是错的，他们也同样认为这个句子是错误的。
既然如此，该句就可以尘封，不用理睬它了。
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