a. 按重要性次第排列(arrangement in-groups importance)
Ifyou work as a soda jerker， you will， of course， not need much skill inexpressing yourself to be effective. If you work on a machine， your ability toexpress yourself will be of little importance. But as soon as you move one stepup from the bottom， your effectiveness depends on your ability to reach othersthrough the spoken or the written word. And the further away your job is frommanual work， the larger the organization of which you are an employee， the moreimportant it will be that you know how to convey your thoughts in writing orspeaking. In the very large business organization， whether it is thegovernment， the large corporation， or the Army， this ability to express oneselfis perhaps the most important of all the skills a man can possess.
这一段谈的是表达才干，它的重要性与职业，身份有关，从"not need much skill"或"of little importance"到"more important"， 最后是"most important"。
b. 由一般到特殊排列(general-to-specific arrangement)
If areader is lost， it is generally because the writer has not been careful enoughto keep him on the path. This carelessness can take any number of forms.Perhaps a sentence is so excessively cluttered that the reader， hacking his waythrough the verbiage， simply doesn't know what it means. Perhaps a sentence hasbeen so shoddily constructed that the reader could read it in any of severalways. Perhaps the writer has switched tenses， or has switched pronouns inmid-sentence， so the reader loses track of when the action took place or who istalking. Perhaps sentence B is not logical sequel to sentence A ---- thewriter， in whose head the connection is clear， has not bothered to provide themissing link. Perhaps the writer has used an important word incorrectly by nottaking the trouble to look it up. He may think that "sanguine" and"sanguinary" mean the same thing， but the difference is a bloody bigone. The reader can only infer what the writer is trying to imply.
这一段谈的是a writer's carelessness， 先给出一个general statement作为主题句，然后经过5个"perhaps"加以例证。
c. 由特殊到一般排列(specific-to-general arrangement)
I donot understand why people confuse my Siamese cat， Prissy， with the one I hadseveral years ago， Henry. The two cats are only alike in breed. Prissy， aquiet， feminine feline， loves me dearly but not possessively. She likes to keepher distance from people， exert her independence and is never so rude as tobeg， lick， or sniff unceremoniously. Her usual posture is sitting upright， eyesclosed， perfectly still. Prissy is a very proper cat. Henry， on the other hand，loved me dearly but possessively. He was my shadow from morning till night. Heexpected me to constantly entertain him. Henry never cared who saw him doanything， whether it was decorous or not， and he usually offended my friends insome way. The cat made himself quite comfortable， on the top of the television，across stranger's feet or laps， in beds， drawers， sacks， closets， or nooks. Thedifference between them is imperceptible to strangers.
Walter'sgoal in life was to become a successful surgeon. First， though， he had to getthrough high school， so he concentrated all his efforts on his studies --- inparticular， biology， chemistry， and math. Because he worked constantly on thesesubjects， Walter became proficient in them； however， Walter forgot that heneeded to master other subjects besides those he had chosen. As a result，during his junior year of high school， Walter failed both English and Latin.Consequently， he had to repeat these subjects and he was almost unable tograduate on schedule. Finally， on June 6， Walter achieved the first step towardrealizing his goal.