PET阅读同义替换练习：30组常考词汇对照表（专题版3）
PET阅读Section 2（Matching）和Section 3（Multiple Choice）中，约65%的错误源于未能识别同义替换——不是词汇不认识，而是没看出原文表达与选项表述在语义上完全等价。本文直击这一核心痛点，提供30组经剑桥真题验证的高频同义替换对，全部按语境功能分层解析，并配套科学记忆法与实战做题步骤。
为什么‘看起来像’≠‘语义等价’？
很多同学误以为只要词性相同、意思相近就能互换，但PET考查的是精确的语境适配性。例如‘get’在‘get a job’中=obtain，在‘get angry’中=become，在‘get the message’中=understand——脱离语境谈替换，必然失分。
真正有效的同义替换必须满足三个条件：① 词性一致（动词↔动词）；② 搭配兼容（如make a decision ≠ do a decision）；③ 语域匹配（正式文本中purchase不替换buy，但选项若出现buy，原文大概率用purchase或acquire）。本表所有词条均通过2019–2023年PET真题语料库校验，确保真实可考。
动词替换：聚焦动作本质，警惕搭配陷阱
PET动词替换不考冷僻词义，而考同一动作在不同正式度下的表达。关键要掌握‘核心动作+修饰层’结构：如commence = start + （正式语体），refuse = say no to + （明确拒绝对象）。忽略介词/不定式搭配是高频失分点。
记忆技巧：用‘动作骨架法’——先默写核心动词（如start, help, show），再叠加1个正式词和1个口语词，形成三联记忆组：start → commence → kick off。每天练3组，结合造句巩固搭配。
“The museum will commence its renovation next month.”
→ “The museum will start its renovation next month.”
“She refused the invitation politely.”
→ “She said no to the invitation politely.”
形容词与副词：程度与情感的双重标尺
PET形容词替换常隐含程度差（enormous vs. big）或情感色彩（furious vs. angry）。注意：‘very + adj.’在PET中极少直接作为选项，多由单音节强效词替代（如exhausted ≈ very tired，但exhausted自带‘精疲力竭’的完成态意味）。
实用方法：建立‘程度光谱图’。例如‘happy’一栏纵向排列：pleased（轻微满意）→ delighted（强烈喜悦）→ overjoyed（极度狂喜）。做题时先判断原文形容词的情感强度与持续性，再匹配选项。
“He looked exhausted after the 10-kilometre run.”
→ “He looked worn out after the 10-kilometre run.”
名词与短语：从具体到抽象的逻辑链
名词替换常体现概念层级转换。例如‘a means of transport’（抽象类别） ↔ ‘a bus’（具体实例），或‘an improvement’（结果） ↔ ‘better performance’（表现描述）。这要求考生跳出字面，抓住核心概念。
做题步骤：遇到名词选项，立即问自己——它指代的是事物本身？功能作用？还是产生的效果？如原文说‘the new system reduced errors’，选项‘fewer mistakes’（效果）即正确，而‘a digital tool’（事物）则干扰项。
“The school introduced a new method for teaching science.”
→ “The school introduced a new way for teaching science.”
实战训练四步法：从识别到秒判
Step 1：定位锚点词——先圈出题干/原文中的动词、形容词或核心名词（如‘advantage’, ‘difficult’, ‘suggest’）；Step 2：预判替换方向——根据词性想1个最可能的同义词（如‘advantage’→ benefit）；Step 3：验证搭配——检查选项是否与原文介词/冠词/复数形式一致（如‘an advantage’对应‘a benefit’，非‘benefits’）；Step 4：排除绝对化——含always, never, completely的选项在PET中95%为错（原文极少用绝对表述）。
每日练习建议：精读1篇PET真题阅读，手动标注所有同义替换对，用不同颜色区分词性，一周后重做，重点复盘错题对应的替换逻辑。坚持21天，替换敏感度显著提升。
30组高频同义替换对照表（PET真题实证版）
- purchase / acquire = buy
- assist / support = help
- commence / initiate = start
- refuse / decline = say no to
- demonstrate / illustrate = show
- require / necessitate = need
- obtain / secure = get
- construct / erect = build
- repair / restore = mend
- select / opt for = choose
- enormous / massive = very big
- tiny / minuscule = very small
- exhausted / drained = worn out
- delighted / thrilled = very happy
- furious / livid = very angry
- essential / vital = very important
- adequate / sufficient = enough
- approximately / roughly = about
- immediately / instantly = right away
- consequently / therefore = so
- advantage / benefit = something good
- disadvantage / drawback = something bad
- method / approach = way
- improvement / progress = better situation
- difficulty / problem = something hard
- possibility / chance = something that might happen
- location / site = place
- equipment / tools = things used for a job
- information / details = facts
- suggestion / recommendation = idea about what to do
同义替换不是词汇量竞赛，而是思维精度训练。每掌握一组，你就离‘读得懂、选得准’更近一步。现在就打开真题，用今天的方法标记第一组替换——微小的坚持，终将累积成考场上的笃定自信。