考研英语二 · 核心语法与长难句速查

1. 时态呼应

一句话规则：主从句时态要"对表"——主句是过去时，从句原则上落在过去范畴内；但客观真理、普遍事实在从句中仍保留现在时。

1. He said that he had finished the report before the deadline arrived. 他说在截止日期到来之前他就已经完成了报告。
2. The professor explained why the results of the experiment had differed so sharply from what had been predicted. 教授解释了为什么实验结果与当初的预测相差如此之大。
3. Economists have long believed that consumer confidence plays a decisive role in economic recovery. 经济学家一直认为，消费者信心在经济复苏中起着决定性作用。（主句完成时+从句现在时：普遍事实不后移）

易错点：① 宾语从句表客观真理时不变过去时（如上句 3）；② since 从句用过去时、主句用完成时（He has changed since he came）；③ 主句现在时/将来时时，从句按实际时间自由选时态，不要机械后移。

2. 被动语态

一句话规则：只有及物动词能变被动；动作执行者未知或不重要时省略 by 短语，时态全部体现在 be 动词上。

1. It is widely acknowledged that lifelong learning has become a prerequisite for career development. 人们普遍承认，终身学习已成为职业发展的先决条件。
2. The new policy, which was formulated last year, is being implemented in stages across the country. 去年制定的新政策正在全国范围内分阶段实施。（was formulated 一般过去被动；is being implemented 现在进行被动）
3. Measures should have been taken to prevent the problem from worsening, but little attention was paid to it. 本应及早采取措施防止问题恶化，但几乎无人关注。

易错点：① 不及物动词（happen/occur/last）和系动词（look/sound/feel）没有被动；② 时态看 be：is done / was done / is being done / has been done / will have been done；③ 高频句型 It is said / believed / estimated that... 在阅读与写作中都是"不指名执行者"的被动，翻译成"据说/据信"。

3. 定语从句（that / which / who 三选一 + 介词前置）

一句话规则：先行词是人用 who/whom/whose，是物用 which/that；一旦介词提前到关系词前面，就只能用 which（物）或 whom（人），that 彻底出局。

1. The era in which information could be monopolized by a few media outlets has gone forever. 信息被少数媒体垄断的时代已经一去不复返。（介词前置 → 只能用 which）
2. Employees whose performance is closely tied to bonuses tend to work more efficiently. 绩效与奖金紧密挂钩的员工往往工作更高效。
3. The theory to which he devoted his entire life was finally proved by his students decades later. 他毕生献身的理论，在几十年后终于被他的学生们证明。

易错点：① 介词提前后绝不能再接 that；② 只能用 that 的情形：先行词是 all / everything / anything / little，或被序数词、最高级、the only / the very 修饰；③ 非限制性定语从句（逗号 + 关系词）不能用 that；④ where = in which，when = on/at which，可互相替换改写。

4. 状语从句九类

一句话规则：状语从句是"完整句 + 从属连词"，解题先认连词再看时态搭配——时间/条件从句用一般现在时表将来。

九类连词速记：时间 when/while/as/before/after/since/no sooner...than/hardly...when ｜ 条件 if/unless/as long as/provided that ｜ 原因 because/since/as/now that ｜ 让步 although/though/even if/while ｜ 目的 so that/in order that ｜ 结果 so...that/such...that ｜ 方式 as/as if ｜ 地点 where/wherever ｜ 比较 than/as。

1. So long as the government continues to invest in education, the quality of the workforce will improve steadily. 只要政府持续投资教育，劳动力素质就会稳步提高。（条件从句用现在时表将来）
2. Although the company suffered a temporary setback, its core competitiveness remained intact. 尽管公司遭受了暂时的挫折，其核心竞争力依然完好无损。
3. Hardly had the new regulation come into effect when numerous enterprises began to adjust their strategies. 新规定刚一生效，众多企业便开始调整策略。（hardly + 过去完成时 + when）

易错点：① although/though 不能与 but 连用，但可与 yet/still 连用；② no sooner...than 与 hardly...when 是硬搭配，不得混搭；③ so that 后接 can/may 多表目的，接一般过去式多表结果；④ 时间、条件从句里不出现 will，"如果你来"译 If you come 而非 If you will come。

5. 名词性从句（主语/宾语/表语/同位语从句）

一句话规则：that 引陈述句、whether/if 引一般疑问、wh- 词引特殊疑问——不管原句多疑问，从句内部一律还原成陈述语序。

1. What distinguishes successful learners from unsuccessful ones is not intelligence but persistence. 区分成功学习者与失败者的不是智力，而是坚持。（what 从句作主语）
2. Whether remote work will fundamentally change the way we live remains to be seen. 远程办公是否会从根本上改变我们的生活方式，仍有待观察。
3. The survey reveals that an increasing number of young people are reluctant to follow the traditional career path. 调查显示，越来越多的年轻人不愿走传统职业道路。

易错点：① 从句内禁止疑问倒装：只能说 Do you know where he is，不能 where is he；② 介词之后、不定式之前只能用 whether，不能用 if；③ that 在宾语从句中可省略，在主语从句和同位语从句中不可省；④ 主语从句过长时用 it 作形式主语：It is clear that...

6. 非谓语三态（doing / done / to do）

一句话规则：doing 表主动或进行，done 表被动或完成，to do 表目的或将来——非谓语的逻辑主语必须与主句主语一致，否则就是悬垂结构错误。

1. Confronted with fierce competition in the job market, many graduates choose to further their education. 面对就业市场的激烈竞争，许多毕业生选择继续深造。（逻辑主语 = many graduates，被动用 done）
2. Having been translated into more than thirty languages, the novel has attracted a worldwide readership. 这部小说被译成三十多种语言之后，吸引了全世界的读者。（先被动后发生，用 having been done）
3. The government has taken effective measures to reduce the widening gap between the rich and the poor. 政府已采取有效措施来缩小不断扩大的贫富差距。（to do 表目的）

易错点：① 句首分词状语的主语若与主句主语不一致即为悬垂分词，是长难句理解与写作双高频考点；② done 与 having been done：前者表与谓语同时/一般情况，后者强调先发生；③ to do 作后置定语天然含将来意味（the next train to arrive 下一班将到的火车）；④ 独立主格（with + n. + doing/done）常在长难句里作伴随状语。

7. 虚拟语气三档

一句话规则：与现在相反：if + 过去式（be 一律 were），主句 would do；与过去相反：if + had done，主句 would have done；与将来相反：if + should/were to do，主句 would do。

1. If every citizen were aware of the importance of environmental protection, our cities would be far more livable. 如果每个公民都意识到环保的重要性，我们的城市将宜居得多。（与现在相反，be 用 were）
2. Had the company taken the customers' feedback seriously, it would not have lost such a large market share. 倘若公司当初认真对待顾客反馈，就不会失去这么大的市场份额。（与过去相反 + 省略 if 倒装）
3. Should artificial intelligence replace most manual labor, society would have to redefine the meaning of work. 倘若人工智能取代大部分体力劳动，社会将不得不重新定义工作的意义。（与将来相反 + 倒装）

易错点：① 省略 if 时要把 were/had/should 提到句首构成倒装，句首无 if 却见 Had/Should/Were 开头，先按虚拟处理；② 主句 would have done 配从句 had done，两边时态必须对档；③ 混合虚拟（从句过去、主句现在）考研阅读偶见，按各自时间轴判断；④ wish 后从句时态后移一档，It is (high) time that sb did/should do 也属固定虚拟。

8. 倒装四型

一句话规则：句首出现否定副词、only+状语、so/such...that、肯定附和（so do I）四类标志时，把助动词（或 be）提到主语之前构成倒装；否定词与 only 修饰主语时不倒装。

1. Not until the financial crisis broke out did people realize how fragile the banking system was. 直到金融危机爆发，人们才意识到银行体系多么脆弱。（否定短语提前 → 部分倒装）
2. Only when education keeps pace with technological change can a country maintain its competitive edge. 只有当教育与技术变革同步时，一个国家才能保持竞争优势。（only + 状语从句 → 主句倒装）
3. So rapid is the development of digital technology that last year's products quickly become outdated. 数字技术发展如此迅速，以至于去年的产品很快就过时了。（so + adj. 提前 → 完全倒装）

易错点：① 部分倒装只提前助动词/情态动词/be；完全倒装整个谓语动词搬到主语前（So rapid is the development）；② No sooner 放句首用 had + done 倒装（No sooner had he arrived than...）；③ not only...but also 连接两个分句时只倒装前半句；④ Only he（only 修饰主语）不倒装——倒装与否看 only 是否修饰状语。

9. 强调与省略

一句话规则：强调句骨架 It is/was + 被强调部分 + that/who...，检验法是去掉 it is...that 后句子依然完整；状语从句省略的条件是主从句主语一致且从句里有 be。

1. It is persistent effort rather than talent that ultimately determines how far one can go. 最终决定一个人能走多远的，是持之以恒的努力而非天赋。
2. It was not until the late twentieth century that the concept of sustainable development gained wide acceptance. 直到二十世纪末，可持续发展的理念才被广泛接受。（强调 not until，that 后用肯定式）
3. While (they were) working in the factory, the workers accumulated rich practical experience. 在工厂工作期间，工人们积累了丰富的实践经验。（主从句主语一致 → 省略 they were）

易错点：① 强调句 vs 形式主语：It is important that... 是形式主语（去掉骨架句子不完整），It is Tom that... 是强调句；② 强调 not until 时，that 之后必须接肯定结构（that people realized，不是 didn't realize）；③ when/while/if/though 从句省略的前提是主语与主句一致且含 be，否则不能省；④ It was...that 强调时间/地点时不用 when/where，一律 that。

10. 比较结构（as...as / the more...the more / 倍数）

一句话规则：as...as 中间用原级、比较级后接 than；the more..., the more... 前半是从句后半是主句；倍数表达三选一：倍数 + as...as / 倍数 + 比较级 than / 倍数 + the size (length, number) of。

1. Nothing is more important for a fresh graduate than gaining hands-on experience. 对应届毕业生而言，没有什么比获得实践经验更重要。（最高级式比较，写作万能句）
2. The more children are exposed to books, the stronger their reading habits will become. 孩子接触书籍越多，其阅读习惯就会越牢固。
3. The output of this year is three times as much as that of ten years ago. 今年的产量是十年前的三倍。（用 that 指代 output 保证比较对象对称）

易错点：① 比较对象必须对称：that 指代单数/不可数、those 指代复数（the population of China is larger than that of Japan）；② 倍数三种句型可互换，倍数永远放在最前面（three times larger than = three times as large as = three times the size of）；③ no more than = 只有、仅仅，not more than = 不超过，语义不同；④ 最高级修饰副词时 the 可省（runs fastest），修饰形容词不可省。

1. 第一步 · 找谓语动词：每个分句只有一个限定谓语（时态词 + 实义动词/系动词）。数出谓语个数 = 分句个数。警惕把不定式 to do、分词 doing/done、动名词误认成谓语——它们都没有时态，不是谓语。
2. 第二步 · 抓连词切分：看到 that / which / who / whose / when / while / although / because / but / and / if 等连词就从它前面下刀，把句子切成若干"完整句"，再逐一找各分句的主谓。
3. 第三步 · 识别修饰成分：定语挂在名词后面（从句、分词、介词短语、不定式），状语挂在动词或整句上（时间、地点、原因、方式），插入语（逗号隔开的部分）先整体跳过，绝不影响主干判断。
4. 第四步 · 还原语序：倒装还原成正常语序、被动还原出 by 的逻辑主语、强调句去掉 it is...that、省略句把省掉的主语和 be 补回来，让每个分句变成"主—谓—宾"的标准形。
5. 第五步 · 中文重排序：英文定语后置的搬到名词前（过长的定语拆成短句）、状语按中文习惯放句首或动词前、同位语用破折号或"即/这一"承接，最后通读一遍保证像中文。

示范一 · 主语从句 + 表语从句 + 同位语（42 词）

What seems to be happening is that companies which once relied on cheap labor are now being forced to invest in automation, a shift that could eventually eliminate millions of routine jobs across the manufacturing sector.

1. 找谓语：seems / is / are being forced / could eliminate —— 4 个谓语，4 个分句。
2. 抓连词：What（主语从句）、that（表语从句）、which（定语从句修饰 companies）、that（定语从句修饰 a shift）。
3. 认修饰：a shift 是前面整个 automation 分句的同位语；across the manufacturing sector 是 jobs 的后置定语；now、eventually 为时间状语。
4. 还原语序：被动还原 are being forced to do = "被迫去做"；主干即"眼下正在发生的事情是……"。
5. 中文重排：主语从句先行，主句次之，同位语用破折号补成独立短句。

译文眼下似乎正在发生的情况是：一度依赖廉价劳动力的公司如今被迫投资自动化——这一转变最终或将消灭制造业数以百万计的常规岗位。

示范二 · 让步状语从句 + 宾语从句 + 插入语（40 词）

Although the proportion of employees who telecommute at least twice a week rose steadily between 2010 and 2020, the vast majority of companies still insist that physical presence, rather than flexible working hours, is the decisive factor in evaluating performance.

1. 找谓语：rose / insist / is —— 3 个谓语，3 个分句。
2. 抓连词：Although（让步状语从句）、who（定语从句修饰 employees）、that（insist 的宾语从句）。
3. 认修饰：who telecommute... 修饰 employees；between 2010 and 2020 时间状语；rather than flexible working hours 是插入语，先跳过；in evaluating performance 修饰 factor。
4. 还原语序：去掉插入语后宾从主干 = physical presence is the decisive factor，一目了然。
5. 中文重排：让步从句前置成"尽管……但……"，插入语放回"决定性因素"之后作对比。

译文尽管 2010 至 2020 年间，每周至少远程办公两次的员工比例稳步上升，但绝大多数公司仍坚持认为，在绩效评估中起决定作用的是线下出勤，而非弹性工时。

示范三 · 强调句 + 原因状语从句 + 非限制性定语从句（41 词）

It is precisely because traditional classroom teaching fails to address the individual needs of students that an increasing number of parents have turned to online platforms, which offer personalized courses at a fraction of the cost of offline tutoring.

1. 找谓语：fails / have turned / offer —— 3 个谓语，3 个分句。
2. 抓连词：because（原因状语从句）、which（非限制性定语从句）；It is ... that 是强调句骨架。
3. 认修饰：precisely 为强调副词；of students 修饰 needs；at a fraction of the cost of offline tutoring 修饰 offer。
4. 还原语序：去掉 It is ... that 还原为 Parents have turned to online platforms precisely because...，句子完整 → 确认强调句，被强调的是原因状语。
5. 中文重排：用"正因为……才……"还原强调语气；which 从句拆成破折号短句。

译文正因为传统课堂教学无法满足学生的个体需求，越来越多的家长才转向在线平台——这些平台以远低于线下辅导的成本提供个性化课程。

• The number of A increased / went up sharply from X to Y during the period 2010–2020.2010 至 2020 年间，A 的数量从 X 急剧增至 Y。
• A rose steadily over the decade, reaching a peak of Y in 2020.十年间 A 稳步上升，并在 2020 年达到 Y 的峰值。
• There was a marked upward trend in the sales volume of A.A 的销量呈现明显的上升趋势。
• A climbed by approximately 30 percent, from X in 2015 to Y in 2020.A 上升了约 30%，从 2015 年的 X 增至 2020 年的 Y。

• The figure for A declined / dropped dramatically from X to Y.A 的数值从 X 大幅降至 Y。
• A witnessed a steady decrease of 15 percent between 2010 and 2020.2010 至 2020 年间，A 稳步下降了 15%。
• A fell to its lowest point, merely Y, in 2020.2020 年，A 跌至最低点，仅为 Y。

• A accounted for / took up the largest proportion, at 45 percent.A 所占比例最大，为 45%。
• A made up nearly half of the total, followed by B (30 percent) and C (20 percent).A 占到总数近一半，其次是 B（30%）和 C（20%）。
• The share of A in the total dropped from 60 percent to 35 percent.A 在总量中的份额从 60% 降至 35%。

• The figure in 2020 was three times as high as that in 2010.2020 年的数值是 2010 年的三倍。
• A doubled / tripled within merely five years.短短五年内，A 翻了一番 / 增至三倍。
• A increased by a factor of four compared with that a decade ago.与十年前相比，A 增长到原来的四倍。

• It can be predicted / anticipated that A will continue to grow in the years to come.可以预见，未来数年 A 将继续增长。
• Given the current momentum, the upward trend is likely to persist.照目前的势头来看，这一上升趋势很可能持续下去。

用法提醒：数据变化主语常换花样（the number of / the figure for / A itself），动词时态与图表年份对齐（过去数据用过去时，趋势预测用将来时）；同一图表至少替换 3 种表达，避免通篇 increase。