2023年6月英语四级第2套真题句子解析： From 1996 to 2016, the pace at which immigrants started businesses was double that of U.S.-born individuals.

From ... to ... (时间跨度表达)

From 1996 to 2016

"from ... to ..." 是表示时间跨度的标准结构,用于界定一个明确的起止时间段。此处 "From 1996 to 2016" 框定了20年的观察窗口。需注意:这个结构既可用于时间 (from Monday to Friday),也可用于空间 (from Beijing to Shanghai) 或抽象范围 (from beginner to expert)。在学术写作和数据陈述中极为常见,是描述研究周期、统计区间的首选表达。中文学习者容易在介词选择上出错,比如误用 "between ... and ..." 来表达时间跨度 (between 强调两个时间点之间的某个时刻,而非整个区间)。

• ✓ from 2010 to 2020 (表示整个十年区间) ✗ between 2010 and 2020 (易被误解为某个时间点) 表达持续的时间段用 from...to,而 between...and 更多指两点之间的位置或状态

the pace at which (关系结构中的介词前置)

the pace at which immigrants started businesses

"the pace at which" 体现了 "名词 + at which" 的关系结构,其中 "at" 是与先行词 "pace" 的固定搭配 (at a pace/rate)。这种结构将介词前置到关系词之前,形成更正式的书面语表达。可替换为 "the pace that immigrants started businesses at",但后者将介词置于句尾,属于非正式口语风格。类似的搭配还有 "the way in which"、"the extent to which"、"the degree to which" 等,都是学术写作的典型标志。中文学习者需要记住这些名词与介词的固定搭配关系:pace/rate/speed 用 at,way/manner 用 in,extent/degree 用 to。

• ✓ the pace at which / the rate at which ✗ the pace which / the pace in which pace 和 rate 固定搭配介词 at,不能省略或替换为其他介词
• ✓ the way in which (正式) / the way that (中性) / the way ø (口语) ✗ the way at which way 搭配 in,而非 at;口语中 in which 可完全省略

start businesses (创业的标准表达)

started businesses

"start a business / start businesses" 是表示 "创业" 的最常用、最地道的英语表达。动词 "start" 在此处强调从零开始建立企业的行为。需与其他近义表达区分:"found a company" 更正式,强调创立 (常用于大型企业);"launch a startup" 特指科技创业;"set up a business" 侧重建立运营架构;"open a business" 更口语化,常指开店。四六级和考研阅读中,商业、经济类文章频繁出现此表达,是必须熟练掌握的基础搭配。中文学习者易受 "做生意" 影响而误用 "do business",但 "do business" 意为 "进行交易、做买卖",而非 "创业"。

• ✓ start a business (创业) ✗ do business (进行商业交易、做买卖) do business 指与他人进行交易,不是创办企业
• ✓ start/found/establish a business ✗ make a business make 不与 business 搭配表示创业,可说 make a profit/deal

double that of (倍数比较的标准结构)

was double that of U.S.-born individuals

"double that of" 是表达倍数关系的核心结构,其中 "that" 为替代词,指代前文的 "the pace"。完整逻辑为:the pace (at which immigrants started businesses) was double the pace of U.S.-born individuals。使用 "that" 避免重复 "the pace",使句子更简洁。倍数表达的标准句型为 "A + be 动词 + 倍数词 + that of B",其中倍数词可以是 double (2倍)、triple (3倍)、twice/three times/four times (2/3/4倍) 等。需注意:"double" 既可作形容词 (as in this sentence) 也可作动词 (The price doubled);"twice" 只能作副词 (twice as large as),不能直接作表语。此结构在统计数据、科研论文、经济报道中极为高频,是学术英语的必备表达。

• ✓ The rate was double that of last year. (that 指代 the rate) ✗ The rate was double than last year. 倍数比较不用 than,而用 that of 或 as...as 结构
• ✓ twice as large as / double the size of ✗ twice larger than / double than 倍数表达用 as...as 或直接加名词,不用比较级 + than
• ✓ The output is triple that of 2010. (triple 作形容词) ✗ The output is tripled that of 2010. 此处需形容词 triple,而非过去分词 tripled

U.S.-born individuals (复合形容词的连字符使用)

U.S.-born individuals

"U.S.-born" 是一个复合形容词,由名词 "U.S." 和过去分词 "born" 通过连字符组合而成,用于修饰 "individuals"。连字符的使用规则:当两个或多个词组合作为单一形容词置于名词前时,需用连字符连接,如 "well-known author"、"five-year-old child"、"state-of-the-art technology"。但若这些词置于名词后作表语,通常不用连字符,如 "The author is well known."、"The child is five years old."。此处 "U.S.-born" 强调在美国出生的身份属性,与 "foreign-born" (外国出生) 相对。类似表达还有 "China-born"、"college-educated"、"self-employed" 等。中文学习者常忽略连字符,导致歧义或不规范。

• ✓ a well-known scientist (置于名词前用连字符) ✗ a well known scientist 复合形容词前置修饰时必须用连字符
• ✓ The scientist is well known. (作表语不用连字符) ✗ The scientist is well-known. 虽然加连字符也可接受,但作表语时通常省略连字符

名词性表达的学术风格 (the pace 而非动词)

the pace at which immigrants started businesses

本句使用 "the pace" (名词) 搭配 "at which" 结构,而非直接用动词表达,这是学术英语的典型特征——倾向于名词化 (nominalization)。对比口语化表达 "Immigrants started businesses twice as fast as U.S.-born individuals",本句通过 "the pace" 将动作抽象为可测量的概念,使表达更客观、更适合数据陈述。学术写作常用的名词化模式还包括:用 "the increase in" 代替 "increase"(动词)、用 "the implementation of" 代替 "implement"、用 "the occurrence of" 代替 "occur"。这种风格在科研论文、政策报告、经济分析中极为普遍,是从口语向书面语过渡的重要标志。中文学习者需培养这种 "名词思维",在正式写作中有意识地使用名词性结构。

• ✓ The increase in temperature was significant. (名词化,学术风格) ✗ The temperature increased significantly. (动词,口语化) 虽然后者语法正确,但学术写作更青睐名词化表达

immigrants vs. U.S.-born individuals (对比用词的精准性)

immigrants U.S.-born individuals

本句使用 "immigrants" 与 "U.S.-born individuals" 形成精确对比。"immigrants" 指移民到美国的外来人口,而 "U.S.-born individuals" 特指在美国本土出生的人。这种用词体现了学术研究的严谨性:避免使用模糊的 "Americans" (既可能包括移民也可能不包括)、"natives" (可能带有文化隐含)、"locals" (过于口语化) 等词。类似的精确对比还有:"urban vs. rural residents"、"public vs. private sector employees"、"full-time vs. part-time workers"。在社会科学、人口统计、政策研究中,这种清晰的分类界定至关重要,避免数据混淆和概念模糊。中文学习者需注意英语中许多看似相近的词在学术语境中有明确的边界。