一、原级比较的基本用法

　　1. 原级比较由“as+形容词或副词(或再加名词或短语)+as ”构成“原级相同”比较句，表示两者比较;其否定式，即“程度不及”比较句型为“not so(as)+形容词或副词+as”，而且as…as结构前可用just，almost，nearly，quite等表示程度的词修饰。

　　2. “as (so)+名词+as+名词”进行名词比较，这时一般情况下有一个表示原级的比较词，但如果第一名词前出现了形容词修饰该词或出现副词修饰谓语，应当用so而不用as。

　　二、比较级

　　1. 比较级由“形容词(副词)比较级+than+…，”构成表示在两者中间一方比另一方“更加…”。连词than后可接句子，也可接名词、代词、名词短语、介词短语、动词、动词不定式、ing结构和ed结构，有时也可省去than。

　　2. 注意than前后两项相比较的人或事物要一致

　　三、最高级

　　1. 最高级用于三者以上比较，形容词的结构形式是“定冠词+形容词最高级+名词+表示范围的短语或从句”(如all，of all，of the tree，in the world，that has ever taken place等)。

　　2. 副词的最高级与形容词最高级的区别在于最高级前没有定冠词the。

　　四、同步练习

　　1)Walking briskly for thirty minutes will burn as many calories as .

　　[A] to run for fifteen minutes

　　[B] running for fifteen minutes

　　[C] you run for fifteen minutes

　　[D] fifteen minute walking

　　解析：B为正确答案。

　　2)The gorilla(大猩猩)，while [A] not quite as curious than [B] the chimpanzee(黑猩猩)，shows more persistence [C] and memory retention(记忆力)in solving [D] a problem.

　　解析：B错。改为as ，和前面的as和形容词原形curious 一起构成同程度比较。

　　3) Alaska is twice [A] as larger [B] as [C] the next largest [D] state，Texas.

　　解析：B错。改为as large.

　　4) Thomas Jefferson's achievements as an architect rival his contributions a politician.

　　[A] such [B] more [C] as [D] than

　　解析：C对。动词rival(胜过、匹敌)前后是两个相比较的成分achievements(成果)和 contributions(贡献)，由于前面的名词后出现了短语 as an architect，故空白处也应用as，使前后对比成分一致。

　　5)I should say Henry is not much a writer as a reporter.

　　[A] that [B] so [C] this [D] as

　　解析：B为正确答案。

　　6)Natural mica(云母)of [A] a superior [B] quality is cheapest [C] to obtain than synthetic [D] mica.

　　解析：C错。应改为比较级cheaper.比较级后并不一定跟接连词than，有时在其间有名词或名词短语(被形容词所修饰)，介词短语，不定式或其他成分隔开。

　　7)She is older than .

　　[A] any other girl in the group [B] any girl in the group

　　[C] all girls in the group [D] you and me as well as the group

　　解析：A为正确答案。“She”作为单个不能跟全组比(C和D不对)，也不能跟全组所有相比，因为“她”也是其中一员，自然“她”不能跟自己相比。这里“She”比较的是“这组中的任何一个”，所以A对。

　　8)Josephine McCrackin joined [A] the “Santa Cruz Sentinel” in 1905 and，until her death fifteen years late [B] ，remained [C] active in journalistic [D] work.

　　解析：B错。应改为比较级later，因此处实为与1905年相比晚15年，故应使用比较级。

　　9)The purpose of the research had a more important meaning for them than .

　　[A] ours [B] with us [C] for ours it had [D] it did for us

　　解析：D为正确答案。

　　10)Sound travels air .

　　[A] faster through water than through [B] faster than through water and

　　[C] through water faster and[D] where it is faster through water than through

　　解析：A为正确答案。

　　11)Gerbrand von den Feckhout，one of Rembrand's pupils，followed [A] the style of his teacher so implicitly that [B] his paintings [C] are sometimes confused with his master [D] .

　　解析：D错。改为his master's.

　　12)The more [A] fearsome of all the [B] animals in [C] the Western [D] Hemisphere is the grizzly bear.

　　解析：A错。改为most.

　　13)Of all economic [A] problems，inflation continues to be [B] a [C] most significant in its daily impact on [D] people and business.

　　解析：C错。改为the， significant是多音节形容词，在此处应用最高级形式(在前面加 the most)，注意句中的“of all… ”。

　　14) ，the most familiar to general public is the criminal jurisdiction.

　　[A] All the activities [B] The activities

　　[C] Of all the activities [D] It is the activities

　　解析：C为正确答案。本句空白处缺状语，A和B全为名词短语，不符合条件;D为句子，和空白后面的句子没有任何联系，故亦应排除。只有C正确，和后面的最高级the most familiar前后呼应。

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