摘要：核心矛盾‌：同一个先行词，在从句中作状语用 where/when，作宾语用 which/that

一、介词 + 关系代词（最难得分点）

典型结构‌：名词 + 介词 + which/whom

难点‌：需根据从句动词或名词搭配倒推介词

真题示例‌：

extent 结构‌（必用 to）

The problem has reached a point ______ immediate action is essential.

（答案：‌to which‌ ）

解析：固定搭配 "to the extent"（到...程度），此处 point = extent

agree 结构‌（需判断介词）

He proposed a plan ______ all members finally agreed.

（答案：‌on which‌ ）

解析：agree on sth（就某事达成一致），先行词 plan 作 on 的宾语

技巧‌：

提取从句动词：agree → 需补全 agree with/on/to

若从句不缺主/宾语，直接填 where（抽象地点）或 when（抽象时间）

二、关系副词 vs 关系代词的混淆陷阱

核心矛盾‌：同一个先行词，在从句中作状语用 where/when，作宾语用 which/that

对比真题‌：

① The factory ______ we visited last year closed down.

（答案：‌which/that‌ ，visited 缺宾语）

② The factory ______ his father worked was outdated.

（答案：‌where‌ ，work 后不缺成分，缺地点状语）

误将 occasion/point/stage 等抽象名词全用 when（实际上也可用 where 强调情境）

如：It was a situation ______ calmness mattered most. （‌where‌ 更强调环境条件）

不定式干扰‌：

The only way ______ (solve) the crisis is cooperation.

（答案：‌to solve‌ ，非从句，way 后接不定式作定语）

分词干扰‌：

The boy ______ (stand) under the tree is my cousin.

（答案：‌standing‌，现在分词作后置定语，非从句）

The boy ______ we saw under the tree is my cousin.

（答案：‌who/whom/that‌ ，saw 缺宾语）

名词后接"介词+______" 锁定固定搭配（如 extent to） ‌to which‌

固定结构：‌degree to which‌

当 ‌degree‌ 表示抽象“程度”时，定语从句必须用 ‌to which‌ 或 ‌where‌ 引导，对应固定搭配 ‌to the degree‌（达到…程度）。

结构公式‌：

degree + ‌to which‌ + 完整句子

或

degree + ‌where‌ + 完整句子

真题示例‌：

It's embarrassing to recognize the degree ‌to which‌ my curiosity paralleled their interests.

（正确：‌to which‌，不可用 when）

The drought reached a degree ______ crop failure became unavoidable.

（答案：‌to which‌ 或 ‌where‌）

错误陷阱‌：

误用 ‌when‌：× the degree when

误用 ‌that/which‌（从句不缺主/宾语）：× the degree that...

degree‌ 与 ‌extent‌ 的通用性

两者均表“程度”，结构完全互换（均需搭配 ‌to‌）：

先行词‌ ‌正确引导词‌ ‌错误示例‌

degree ‌to which / where‌ × to that / × when

extent ‌to which / where‌ × at which / × when

对比真题‌：

The problem developed to an extent ______ control was impossible.

（答案：‌to which‌）

His anger grew to a degree ______ he couldn't speak.

（答案：‌where‌）

难点对比练习

句子‌ ‌选项‌ ‌答案‌ ‌解析‌

We were shocked at the degree ______ the system had been corrupted. A. that B. to which C. when D. what ‌B‌ 固定搭配 to the degree

The debate reached a degree ______ no agreement seemed possible. A. where B. when C. which D. why ‌A‌ 抽象情境用 where

This is the degree ______ caused the failure. A. that B. to which C. where D. when ‌A‌ degree 作从句主语（罕见）

来源：柯昊教育