2020年12月英语六级第1套真题句子解析： Tobacco taxes, which generate more than twice as much, have proven instrumental in the decline of smoking, which has saved millions of lives.

more than twice as much (倍数比较结构)

more than twice as much

这是英语中表达倍数比较的标准结构："more than + 倍数词 + as much/many"。"twice as much" 表示「两倍之多」,"more than twice as much" 则强调「超过两倍」。这里 "as much" 后省略了比较对象(likely 省略了与另一税收来源的比较)。该结构在学术写作和数据分析类文章中极为常见,是表达倍数关系的首选方式。中文学习者常犯的错误是按中文语序说成 "two times more than",虽然口语可接受,但正式写作中 "twice as much" 更地道。需要注意 "as much" 用于不可数(如金额、程度),"as many" 用于可数。

• ✓ Tobacco taxes generate more than twice as much revenue. ✗ Tobacco taxes generate more than two times revenue. 倍数比较的标准结构是 "倍数词 + as much/many",而非 "倍数词 + 名词"。
• ✓ She earns twice as much as I do. ✗ She earns twice more than me. "twice as...as" 是标准结构;"twice more than" 虽然口语中出现,但不如前者正式和精确。

prove instrumental in (固定搭配)

proven instrumental in

"prove instrumental in" 是学术写作中的高频固定搭配,意为「在……中起到关键作用/证明是有效手段」。"instrumental" 本意是「工具性的、起媒介作用的」,在此搭配中引申为「关键的、有效的」。"prove" 作系动词,后接形容词 "instrumental",再由介词 "in" 引出具体领域或成果。这个结构常用于论述某政策、措施、因素对某结果的促成作用,语体正式,带有客观评价意味。注意 "prove" 在此为系动词(linking verb),不是实义动词,相当于 "turn out to be" 或 "be shown to be"。

• ✓ Technology has proven instrumental in improving efficiency. ✗ Technology has proven instrument in improving efficiency. "instrumental" 是形容词,"instrument" 是名词;"prove" 作系动词后接形容词。
• ✓ The policy proved instrumental in reducing poverty. ✗ The policy proved instrumentally to reduce poverty. "prove instrumental in + 名词/动名词" 是固定结构,不用副词形式或不定式。

generate (熟词精确义)

generate

"generate" 在此表示「产生(收入)、创造(税收)」,是经济、财政领域的术语性用法。虽然该词基础含义是「产生、生成」,但在财政语境中特指「通过征税或经营活动产生收入」,带有系统性、持续性的意味,比简单的 "make" 或 "get" 更正式、更精确。这种用法在政策分析、经济报告中极为常见。搭配上常见 "generate revenue/income/profit/tax"。中文学习者容易忽视其术语性质,误用更口语的 "make money" 等表达。

• ✓ The new tax policy generates substantial revenue. ✗ The new tax policy makes substantial revenue. 财政语境中 "generate" 比 "make" 更专业、更正式。

decline (名词用法与搭配)

the decline of smoking

"decline" 在此作名词,表示「下降、衰退」,后接介词 "of" 引出下降的对象。"the decline of + 名词" 是标准搭配,常用于描述某现象、行为、指标的减少趋势。需注意 "decline" 作名词时常与定冠词 "the" 连用,尤其是在特指某具体领域的下降时。该词比 "decrease" 或 "reduction" 更强调持续性的、逐渐的减少过程,常用于长期趋势分析。与之相关的常见搭配还有 "in decline"(处于衰退中)、"decline in + 名词"(在某方面的下降)。

• ✓ the decline of traditional industries ✗ the decline for traditional industries "decline of" 是标准搭配,表示「……的衰退」,不用 "for"。

双层非限定性定语从句的递进逻辑

which generate more than twice as much which has saved millions of lives

本句包含两个非限定性定语从句(用逗号隔开、由 "which" 引导),构成递进的逻辑链条。第一个 "which generate..." 修饰 "Tobacco taxes",补充说明其税收规模;第二个 "which has saved..." 修饰 "the decline of smoking",说明吸烟率下降的积极后果。这种双层结构不仅传递信息,更重要的是建立因果递进关系:「烟草税收入高」→「对降低吸烟率起关键作用」→「拯救数百万生命」,层层推进论证烟草税的价值。非限定性定语从句在学术写作中常用于添加背景信息、补充论据或建立逻辑联系,是增强论证深度的重要手段。需注意这种从句不能用 "that" 引导,且必须用逗号与主句隔开。

• ✓ The policy, which was implemented last year, has shown positive results. ✗ The policy that was implemented last year has shown positive results. 补充性信息用非限定性定语从句(which + 逗号),限定性识别用 "that" 无逗号。
• ✓ He moved to Beijing, which is the capital of China. ✗ He moved to Beijing which is the capital of China. 非限定性定语从句必须用逗号隔开,否则改变句意或造成语法错误。

现在完成时表持续影响

have proven has saved

句中两处使用现在完成时:"have proven" 和 "has saved"。现在完成时在此强调过去的行为或政策对现在仍有持续影响或相关性。"have proven instrumental" 表示烟草税的作用已得到验证且至今有效;"has saved millions of lives" 强调拯救生命这一成果延续至今,不是已结束的历史事件。这种时态选择在政策评价、研究报告中很常见,用于强调研究发现或政策效果的现实意义,而非仅仅陈述过去的事实。若改用一般过去时 "proved" 或 "saved",则侧重陈述历史事实,缺少与现在的联系。中文学习者常因中文无明显时态标记而误用时态,需理解英语时态背后的「视角」差异。

• ✓ The research has shown significant results (and is still relevant). ✗ The research showed significant results (when discussing ongoing relevance). 强调结果对现在仍有影响时用现在完成时;仅陈述过去事实用过去时。

millions of lives (量化表达的说服力)

millions of lives

"millions of lives" 是量化修辞手法,用具体数量级增强论证说服力。"millions of" 表示「数以百万计的」,虽未给出精确数字,但通过数量级的明确传递信息的重大性和政策影响的广度。这种「模糊量化」(vague quantification)在政策论述、公共健康领域极为常见,既避免了精确数据可能引发的争议,又比 "many lives" 或 "a lot of lives" 更具冲击力和可信度。"lives" 用复数强调每一个个体生命,比抽象的 "人数" 更具人文关怀和情感共鸣。这是学术写作中平衡科学性与说服力的典型技巧。

"which" 的双重指代清晰性

which generate which has saved

本句两个 "which" 的先行词不同:第一个 "which" 指代 "Tobacco taxes"(复数,故谓语用 "generate"),第二个 "which" 指代 "the decline of smoking"(单数,故谓语用 "has saved")。中文学习者常因中文无须区分单复数而在此类句子中混淆指代关系或谓语单复数。判断 "which" 指代对象的关键是:1)就近原则——通常指代离它最近的合理先行词;2)逻辑一致性——从句内容须与先行词在逻辑上匹配;3)主谓一致——从句谓语的单复数须与先行词一致。本句中,第一个 "which" 后的 "generate"(复数形式)与 "Tobacco taxes" 呼应,第二个 "which" 后的 "has saved"(单数形式)与 "the decline" 呼应,体现了严谨的语法一致性。

• ✓ The taxes, which generate revenue, fund public services. ✗ The taxes, which generates revenue, fund public services. "which" 指代复数 "taxes",从句谓语须用复数形式 "generate"。
• ✓ The decline, which has continued for years, is encouraging. ✗ The decline, which have continued for years, is encouraging. "which" 指代单数 "decline",从句谓语须用单数形式 "has"。

介词 "in" 在抽象领域的用法

instrumental in the decline in the decline of smoking

介词 "in" 在此有两处体现:"instrumental in" 和 "in the decline"。"in" 在抽象语境中表示「在……领域/方面/过程中」,这种用法对中文学习者较难掌握,因为中文常用「对……」或「在……上」,不一定对应英语的 "in"。"instrumental in" 是固定搭配,"in" 不可替换为其他介词;"in the decline" 中的 "in" 表示「在……这一过程/现象中」,强调参与或作用于某个过程。类似用法还有 "role in"(在……中的角色)、"increase in"(在……方面的增长)、"change in"(在……方面的变化)。需通过大量阅读和搭配记忆来内化这种用法,不能简单对应中文介词。

• ✓ She played a key role in the project's success. ✗ She played a key role for the project's success. "role in" 是标准搭配,"in" 表示在某领域/过程中,不用 "for"。
• ✓ There was a decline in unemployment. ✗ There was a decline of unemployment. "decline in + 领域/指标" 表示在某方面的下降;"decline of + 事物" 表示某事物本身的衰落,含义不同。