2016年考研英语一真题句子解析： Their analysis ruled out the possibility that it was firms' political influence, rather than their CSR stand, that accounted for the leniency: Companies that contributed more to political campaigns did not receive lower fines.

Their analysis ruled out the possibility that it was firms' political influence, rather than their CSR stand, that accounted for the leniency: Companies that contributed more to political campaigns did not receive lower fines.

冒号连接两个独立的主谓结构:前半句主语是 "Their analysis",谓语是 "ruled out";后半句主语是 "Companies that contributed more to political campaigns",谓语是 "did not receive"。冒号在此处起对等连接作用,后句对前句的结论提供支撑证据,两句之间是因果关系(后句是前句判断的依据)。这符合并列句的定义:两套独立主谓由对等手段连接。

the possibility that it was firms' political influence, rather than their CSR stand, that accounted for the leniency

这是从句套从句的两层嵌套。第一层:"that it was firms' political influence... that accounted for the leniency" 是同位语从句,修饰 "the possibility"。第二层:在该同位语从句内部嵌套了强调句结构 "it was... that",其中 "that accounted for the leniency" 是强调句的后半部分。从主句算起,这构成了两层的嵌套深度。

it was firms' political influence, rather than their CSR stand, that accounted for the leniency

强调句的基本结构是 "It is/was + 被强调部分 + that + 其余部分"。去掉 "it was" 和 "that" 后,句子还原为 "firms' political influence, rather than their CSR stand, accounted for the leniency",语法完整,证明这是强调句而非主语从句。此处强调的是主语部分 "firms' political influence, rather than their CSR stand",用来排除某种可能性。

ruled out

"rule out" 是可分式短语动词，核心义项为「排除（某种可能性、选项或假设）」。此句中以过去式 "ruled out" 出现，宾语 "the possibility" 紧随其后，构成 "ruled out + 宾语" 的典型主动语态结构。

识别要点："rule out" 的宾语通常是抽象名词，如 possibility、option、hypothesis、explanation 等，表示通过分析或判断将某种可能性从考虑范围中移除。本句宾语是 "the possibility that..."，即一个带同位语从句的可能性，完全符合该短语动词的典型搭配。

与假阳性的区分：如果 "rule" 是名词（如 "the rule out there"）或 "out" 是独立的地点/方向副词（如 "rule out of the competition" 中 "out of" 是介词短语），则不构成短语动词。本句中 "ruled out" 紧密结合表达单一动作「排除」，无歧义。

迁移方法：遇到 "rule out" 时，先确认 "rule" 是动词且 "out" 紧随其后（或宾语插入中间如 "rule it out"），再检查语义是否为「排除/否决」；若宾语是抽象的可能性、选项类名词，基本可确认为此短语动词。被动态 "be ruled out" 同样常见，表示「被排除」。

it was firms' political influence, rather than their CSR stand, that accounted for the leniency

"rather than" 在此句中作为介词短语，连接两个名词性成分 "firms' political influence" 和 "their CSR stand"，表达取舍对比关系：是政治影响力而非企业社会责任立场导致了宽大处理。

这是一个嵌套在强调句型（"it was...that"）中的 "rather than" 结构。强调句突出了对比的焦点，"rather than" 明确排除了一个选项（CSR stand）而肯定另一个（political influence）。

识别要点："rather than" 前后连接的成分必须在句法层级上平行——此处都是名词短语（"firms' political influence" vs. "their CSR stand"），且语义上互斥：分析排除的是「是CSR立场起作用」这一可能性，确认的是「政治影响力起作用」。

迁移方法：遇到 "rather than" 时，先找出它连接的两个成分，检查它们是否句法平行（都是名词、动词、从句等）且语义对立；再判断整句是在表达「选A不选B」的取舍关系。如果两个成分不平行或不构成二选一关系，可能是其他用法。

accounted for

"account for" 是不可分式短语动词，"account" 与 "for" 之间不可插入其他成分。此句中以过去式 "accounted for" 出现在强调句型的 "that" 从句中，表示「解释/说明（某现象或结果的原因）」。

义项辨析："account for" 有三个主要义项——①占（比例）、②解释原因、③负责交代。本句语境是分析排除了「是A而非B导致了宽大处理」这一可能性，"accounted for the leniency" 表示「解释了宽大处理（这一现象）的原因」，属于义项②。若改为 "Companies account for 30% of the market"，则为义项①（占比例）；若改为 "You must account for your absence"，则为义项③（负责交代）。

识别要点：判断义项的关键在于 "for" 后的宾语类型和语境。义项②的宾语通常是需要解释的现象、结果或事实（如 leniency、phenomenon、difference），句意为「解释为何出现该现象」；义项①的宾语常为比例或数量（"account for 50%"）；义项③的宾语常为行为或缺失（"account for one's actions"）。

与假阳性的区分：如果 "account" 是名词（"an account for expenses" 表示费用账户），"for" 为独立介词引导修饰成分，不构成短语动词。本句中 "accounted" 明确是动词过去式，"for" 紧随其后引出宾语 "the leniency"，构成完整的短语动词结构。

迁移方法：遇到 "account for" 时，先确认 "account" 是动词且 "for" 紧随（不可分式），再根据宾语判断义项：若宾语是现象/结果类名词且句意为「说明原因」，则为义项②；若宾语是百分比或数量且句意为「占多少」，则为义项①；若宾语是行为且句意为「负责/交代」，则为义项③。