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As的用法
一、as作介词：as+n表示作为。。。，为。。。， 以。。。
1、n+as+n
OG69 Although she had signed a pledge of abstinence as an adolescent, Frances Willard was 35 years old before she chose to become a temperance activist.
2、V+as+n
As引出宾语补语，这样的动词有accept, classify, define, describe, know, name, refer to, regard, speak of, state, take, think, view等
OG120. The Parthenon was a church from 1204 until 1456, when Athens was taken by General Mohammed the Conqueror, the Turkish sultan, who established a mosque in the building and used the Acropolis as a fortress.
OG147. Samuel Sewall, like other seventeenth-century colonists, viewed marriage as a property arrangement rather than an emotional bond based on romantic love.
3、v+as+n: as 引出方式状语（偶没找到例子，呜呜）
二、as作连词
1、表示时间，意思为“一…就。。。”，“当…时”，，“随着…”
OG80. Salt deposits and moisture threaten to destroy the Mohenjo-Daro excavation in Pakistan, the site of an ancient civilization that flourished at the same time as the civilizations in the Nile delta and the river valleys of the Tigris and Euphrates.
As表示以长段时间的逐渐过程
OG84. One legacy of Madison Avenue's recent campaign to appeal to people fifty years old and over is the realization that as a person ages, their concerns change as well.
OG207. In the textbook publishing business, the second quarter is historically weak, because revenues are low and marketing expenses are high as companies prepare for the coming school year.
OG223. As business grows more complex, students who major in such specialized areas as finance and marketing are becoming more and more successful in the job market.
大全132As more and more people invest their money in savings certificates or money-market funds in order to earn higher interest, they are abandoning traditional low-interest investment havens such as passbook accounts and life insurance policies.
大全139 As the etched lines on computer memory chips have become thinner and the chips’ circuits more complex, both the power of the chips and the electronic devices they drive have vastly increased.
2、表示原因，意思为“由于”，“因为”，“既然”
OG184. As measured by the Commerce Department, corporate profits peaked in the fourth quarter of 1988 and have slipped since then, as many companies have been unable to pass on higher costs.
大全128As it becomes more common for both husband and wife to work outside the home, companies are beginning to help in finding new employment for the spouses of transferred employees.
大全131As measured by the Commerce Department, corporate profits peaked in the fourth quarter of 1988 and have slipped since then, as many companies have been unable to pass on higher costs.
3、表示动作的相似性，意思为“就像。。。”
当as从句与主句中的谓语相同时，as从句中的谓语可用do代替，以免重复
(just) as…, +主句
(just) as…, so+主句
(just) as…, +so too+主句（部分倒装）
大全81、Although fruit can no longer grow once it is picked, it continues for some time to respire, taking in oxygen and giving off carbon dioxide, just as human beings do when they breathe.
三、as偶尔作指代词，代替简单主句
大全83 Although it claims to delve into political issues, television can be superficial, as when the three major networks each broadcast exactly the same statement from a political candidate.
逻辑大全中21. The initial causes of serious accidents at nuclear power plants have not so far been flaws in the advanced-technology portion of the plants. Rather, the initial causes have been attributed to human error, as when a worker at the Browns Mills reactor in the United States dropped a candle and started a fire, or to flaws in the plumbing, exemplified in a recent incident in Japan. Such everyday events cannot be thought unlikely to occur over the long run.
19. The charge made above against alternative medicine is most seriously weakened if it is true that
(A) predictions based on orthodox medicine have sometimes failed, as when a patient has recovered despite the judgment of doctors that an illness is fatal
(B) alternative medicine relies on concepts of the body and of the nature of healing that differ from those on which orthodox medicine is based
(C) alternative medicine provides hope to those for whom orthodox medicine offers no cure
(D) a patient’s belief in the medical treatment the patient is receiving can release the body’s own chemical painkillers, diminish allergic reactions, and promote healing
(E) many treatments used for a time by orthodox medicine have later been found to be totally ineffective
其次，as肯定是连词，意思是“正如”，when作副词。加在一起，结合这三个例子，“as when”的意思可以理解为“正如当…的时候。”（我认为gemj此解是不对的，as when好像有举例的意思）
四、inasmuch as:既然；因为，由于
五、insofar as:在。。。的范围
[此贴子已经被作者于2005-7-6 10:20:23编辑过] | 
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发表于 2005-6-29 12:19:00
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