双音节和多音节形容词及大多数副词的比较级及最高级的构成形式:
在原级形容词或副词前加more, most分别表示比较级和最高级。
 
interesting(有趣的)  – more interesting – most interesting
friendly(友好的) – more friendly – most friendly
 
conservatively(保守地) – more conservatively – most conservatively
 
另外还有少数单音节形容词通过在原级加more ,most分别构成相对应的比较级和最高级, 如:
tired(疲劳的) – more tired – most tired
pleased(高兴的) – more pleased – most pleased
glad(高兴的) – more glad – most glad
fit (合适的, 健康的)– more fit – most fit
 
有极少数的形容词/副词在构成比较级及最高级时会出现不规则变化,复习中需要掌握的这类形容词/副词有:
good(好的, 优良的) / well(满意地,充分地,健康的)  – better - best
many / much – more   - most
bad(有害的) / badly(严重地) – worse - worst
little (很少的)     – less   - least
far(遥远的/遥远地)         – further/farther – furthest
 
    历年职称英语考题中多次涉及到形容词副/词比较级/最高级这个考点, 及与它们相关的比较状语从句结构:
    2008年综合类c级考卷中的概括大意与完成句子考题也涉及到了“形容词比较级结构”这个考点:
28. pollution(污染) levels(程度) are lower ___.
完成句子题的被选项为:
a.     on the downwind side
b.     during rush hours
c.     in spring and autumn
d.     to toxic air
e.     between autumn and winter
f.     as exposure to nuclear radiation
问题中问:在什么时候?或在什么地点? 或以什么方式?“污染程度较低”
文章中与该问题相对应的语句为:
pollution levelstend to (往往)be at their lowest during spring(春季) and autumn(秋季)when winds(风) are freshest(清新的, 新鲜的).
该句涉及到了形容词的最高级结构: at their lowest = at their lowest levels
该句说“在春天和秋天污染程度往往最低, 在这两个季节里空气中的风最清新。”根据该句内容判断c(在春天和秋天)是答案。

考生在复习中应该掌握的形容词/副词比较级结构用法归纳如下:
1.“as+adj./adv.+as(与...一样地(形容词/副词的意义))或not so(as)+adj./adv.+as”(不如...那样地(形容词/副词的意义))
he can run(跑) as fast(很快地) as(与...一样) i can(run).
 
my computer(计算机) is not so(as) expensive(昂贵的) as yours.
 
2.“the same (+ n.) as...”表示“与...一样 (的...)”
your pen(钢笔) is the same as mine.
 
3. “形容词/副词比较级+ than ”(比...更(形容词/副词的意义)
jack(杰克) is much(even, still, far) cleverer(更聪明的) than mary(玛丽).
 
jack works(工作) harder(更努力地) than mary.
 
4.“the+形容词/副词比较级…,the+ 形容词/副词比较级…”(越…,越…)
the more difficult(困难的) the questions(问题) are, the less likely(可能的, 可能) he is able to (能够)answer(回答) them.
 
5. “形容词/副词最高级 ” + 介词(of/in)短语结构
of(= among/在...之中) all of them, she is the best(最好的).
 
the mountain(山) is the highest(最高的) in the world(世界上).