2019年12月英语六级第1套真题句子解析： The Cascadia Earthquake Zone is big enough to compete with San Andreas (it's been called the most dangerous fault in America), but it's much lesser known than its California cousin.

big enough to... (形容词 + enough to do 结构)

big enough to compete with San Andreas

"big enough to compete with" 体现了 "形容词 + enough + to do" 这一常见结构,表示"足够……以至于能够……"。这里 "big" 指地震带的规模、危险程度,"compete with" 意为"与……竞争/匹敌",暗示 Cascadia 地震带的威胁程度可与 San Andreas 断层相提并论。该结构在四六级、考研写作中极为常用,可替换形容词表达各种"达到某标准"的含义,如 "smart enough to solve"、"strong enough to withstand" 等。需注意 "enough" 修饰形容词时必须后置(big enough,而非 enough big),这是中文学习者的常见错误。

• ✓ The earthquake zone is big enough to cause serious damage. ✗ The earthquake zone is enough big to cause serious damage. enough 修饰形容词时必须后置,不能像中文"足够大"那样前置。

compete with (短语动词)

compete with San Andreas

"compete with" 是高频短语动词,基本义为"与……竞争",此处用于比喻语境,指 Cascadia 地震带在危险程度上可与 San Andreas 断层"一较高下"。该短语可用于商业竞争("compete with rivals")、体育比赛("compete with other teams"),也可像本句这样用于抽象比较。注意 "compete" 的介词搭配:"compete with/against" 表示"与……竞争","compete for" 表示"为……而竞争"(如 "compete for market share"),"compete in" 表示"参加……竞争"(如 "compete in the Olympics")。中文学习者容易混淆这些介词。

• ✓ Companies compete with each other for customers. / Athletes compete in the championship. ✗ Companies compete for each other. / Athletes compete with the championship. compete with/against 后接竞争对手,compete for 后接竞争目标,compete in 后接比赛/领域,不可混用。

lesser known (比较级 + 过去分词的复合形容词)

much lesser known

"lesser known" 是 "little known"(鲜为人知的)的比较级形式,意为"更不为人知的/知名度更低的"。"lesser" 是 "little" 的比较级,常用于正式书面语,表示程度、重要性、知名度等方面的"更小/更低"。本句用 "much" 修饰比较级 "lesser known",强化程度,表示 Cascadia 地震带的知名度远低于 San Andreas 断层。该结构 "比较级 + 过去分词" 构成复合形容词的用法值得掌握,如 "better-known"(更知名的)、"less-developed"(欠发达的)。注意 "lesser" 不等同于 "less":"lesser" 常用于抽象属性,"less" 用于不可数名词或作副词。

• ✓ This is a lesser-known fact. / He is a well-known author. ✗ This is a less-known fact. (虽语法上可接受,但不如 lesser-known 正式地道) 表示知名度、重要性等抽象概念时,lesser 比 less 更正式、更常用;复合形容词中常用连字符连接。

it's been called... (被动语态表示普遍认知)

it's been called the most dangerous fault in America

"it's been called" 是 "it has been called" 的缩写,现在完成时被动语态,表示"一直以来被称为/被叫作"。这一结构常用于引述他人观点或普遍认知,而非作者本人的断言,带有客观引述的语气,相当于 "people have called it" 或 "it is known as"。本句通过这一结构引出 Cascadia 地震带的别称"美国最危险的断层",既说明其严重性,又保持客观中立。该用法在学术写作、新闻报道中极为常见,如 "it has been called a breakthrough"、"it has been described as revolutionary"。中文学习者需注意区分 "be called"(一般现在时,表示现在的名称)与 "have been called"(现在完成时,强调持续的认知或历史上的称呼)。

• ✓ It has been called the best invention of the century. (强调持续的评价) ✗ It is called the best invention of the century. (仅表示现在的称呼,未体现历史评价) 现在完成时 have been called 强调从过去到现在持续的认知或评价,比一般现在时 is called 更能体现观点的普遍性和时间跨度。

California cousin (比喻用法)

its California cousin

"its California cousin" 中的 "cousin" 并非字面义"表亲",而是比喻用法,指"同类事物/相似对象"。此处将 San Andreas 断层称为 Cascadia 地震带的 "California cousin",形象地表达两者都是大型地震带、性质相似,但地理位置不同(一在加州,一在 Cascadia 地区)。"cousin" 的这一比喻义在英语中较为常见,用于指代同类但有所区别的事物,如 "a cousin species"(近缘物种)、"the British cousin of American jazz"(英国版的美国爵士乐)。中文学习者容易只理解字面义而忽略比喻义,需通过语境判断。本句的 "its" 指代 Cascadia Earthquake Zone。

• ✓ This disease is a cousin of malaria. (比喻:同类疾病) ✗ This disease is a cousin of malaria. (误解为:这种疾病是疟疾的表亲) cousin 除了表示亲属关系,还常比喻"同类事物/相似对象",需根据语境判断,生物、地理、文化领域尤为常见。

Earthquake Zone vs. fault (专业术语辨析)

The Cascadia Earthquake Zone the most dangerous fault in America

本句涉及两个地质学术语:"Earthquake Zone"(地震带)和 "fault"(断层)。两者相关但有区别:"fault" 指地壳中岩层断裂错动的地质构造,是地震的直接成因;"Earthquake Zone" 指地震频发的地理区域,范围通常更广,可能包含多条断层。本句先用 "Earthquake Zone" 介绍 Cascadia,后用 "fault" 称其为"最危险的断层",这里 "fault" 可视为 "earthquake zone" 的同义替换或更具体的指称,强调其地质构造特征。San Andreas 也是著名的断层(San Andreas Fault)。这类术语在科普、考研阅读中常见,理解其区别有助于把握文意层次。

dangerous (程度副词的隐含对比)

the most dangerous fault in America

"the most dangerous" 是最高级,表示 Cascadia 在美国所有断层中危险程度最高。这一表述呼应前文 "big enough to compete with San Andreas",暗示 Cascadia 虽知名度低,但实际威胁可能超过 San Andreas。"dangerous" 在地震语境中指"可能造成严重灾害的",涉及震级潜力、人口密度、建筑抗震能力等综合因素。该词在四六级、考研中常用,可搭配 "highly dangerous"、"potentially dangerous"、"extremely dangerous" 等,表达不同程度的危险性。本句通过最高级强化对比,突出 Cascadia 的严重性与其低知名度的矛盾。

but 转折的对比逻辑

big enough to compete with San Andreas but much lesser known than its California cousin

本句的核心逻辑是对比:Cascadia 地震带在"危险程度"上可与 San Andreas 匹敌("big enough to compete"),"但"("but")在"知名度"上却远远不如("much lesser known")。这一转折突出了矛盾:一个如此危险的地震带,公众却知之甚少,暗示潜在风险被低估。"but" 连接的前后分句形成鲜明对比,是典型的"实力强 vs. 名气小"的修辞手法,常见于科普、新闻写作,用于引起读者重视。理解这一对比逻辑是把握全句主旨的关键:作者意在强调 Cascadia 被忽视的危险性。

括号插入语的补充说明作用

(it's been called the most dangerous fault in America)

本句用括号插入 "it's been called the most dangerous fault in America",对前文 "big enough to compete with San Andreas" 做补充说明,提供更具体的证据支持 Cascadia 的危险程度。括号插入语在书面语中常用于添加背景信息、引述观点或解释术语,既丰富内容,又不打断主句逻辑。此处的插入语强化了 Cascadia 的严重性,使后文 "but it's much lesser known" 的反差更为显著。中文学习者需注意,括号内容虽为补充,但往往包含关键信息,不可轻易跳过;同时,括号不影响主句的语法结构,可先抽离主句理解,再结合插入语完整把握句意。

比较级与最高级的混合使用

big enough to compete with the most dangerous much lesser known than

本句综合运用了多种比较结构:"big enough to"(原级 + enough to 表示"足够……")、"the most dangerous"(最高级,表示"最……的")、"much lesser known than"(比较级,表示"更不……的")。这种混合使用在英语中很常见,但对中文学习者是难点:需准确识别各比较结构的含义与语法,并理解它们如何共同服务于句子的对比逻辑。具体而言:"big enough to compete" 暗示 Cascadia 达到了可与 San Andreas 相比的标准;"the most dangerous" 通过最高级直接断言其危险性第一;"much lesser known than" 通过比较级强调知名度的悬殊差距。掌握这些结构的灵活运用,是提升阅读理解与写作表达的关键。

• ✓ This product is good enough to satisfy most users, the best in its category, but much less popular than its competitor. ✗ This product is enough good to satisfy most users, the better in its category, but much less popular than its competitor. (enough 位置错误,最高级误用比较级) enough 修饰形容词必须后置;表示"最……"用最高级(the best),表示"更……"用比较级(better);不同比较结构可同时出现,需准确识别。

lesser 与 less 的用法区别

much lesser known

中文学习者常混淆 "lesser" 和 "less"。两者都是比较级,但用法不同:"less" 是 "little" 的比较级,主要用作副词(修饰动词、形容词、副词)或修饰不可数名词(如 "less water");"lesser" 也是 "little" 的比较级,但多用于正式书面语,修饰抽象名词或作定语,表示"较小的、次要的、较不重要的",如 "a lesser evil"(较小的恶)、"lesser-known"(不太知名的)。本句的 "lesser known" 是正式书面语用法,若改为 "less known" 虽语法上可接受,但不如 "lesser known" 地道、正式。此外,"lesser" 无法替代 "less" 修饰不可数名词,如不能说 "lesser water"。区分两者需结合语境与语域。

• ✓ He is a lesser-known poet. (正式书面语,修饰抽象属性) / We have less time. (修饰不可数名词) ✗ He is a less-known poet. (虽可理解,但不如 lesser-known 正式) / We have lesser time. (错误,lesser 不修饰不可数名词) lesser 用于正式书面语,修饰抽象属性或作定语;less 用于修饰不可数名词或作副词;两者不可随意互换。

代词 its 的指代识别

its California cousin

"its California cousin" 中的 "its" 指代本句主语 "The Cascadia Earthquake Zone",表示"它的加州表亲",即 San Andreas 断层。代词指代是中文学习者的常见难点,尤其在长句或复杂句中,需根据语境与逻辑判断先行词。本句相对简单,"its" 只能指代句首的 Cascadia,但若句子更复杂,可能出现多个可能的先行词,需仔细辨析。训练方法:找到代词后,向前寻找最近的、逻辑合理的名词或名词短语;若不确定,可代入验证句意是否通顺。本句若将 "its" 理解为 San Andreas 或其他,则 "California cousin" 无法形成合理的指代关系。

• ✓ The Cascadia Earthquake Zone is dangerous, but its California cousin (= San Andreas) is more famous. ✗ The Cascadia Earthquake Zone is dangerous, but its California cousin (误认为指 Cascadia 自己在加州的部分) its 指代 Cascadia,但 California cousin 指的是另一个对象(San Andreas),而非 Cascadia 自己;理解比喻义(cousin = 同类事物)是关键。