在雅思阅读和写作中，灵活地进行同义替换是获取高分的关键技能之一。许多考生常常困惑：雅思同义替换怎么替换？实际上，这种替换并非随意为之，而是遵循着从词汇到词组的系统性方法。掌握这些规律，能有效提升理解与表达的准确性与多样性，从而在考试中游刃有余。
一、词的转换
1. 相同词性的同义替换：
相同词性的同义替换一般指的是只涉及单个单词的转换。单个单词的转换包括词性转换及同义词转换。其中词性转换是相对简单的一种，词汇量可观的考生自然可以游刃有余，轻松应对;即便不认识被转换了的单词的考生，也可以通过词根词缀以及上下文进行猜测。
例如：
Example 1:
One of the brainsmost difficult tasks is to
A. react to their ownthoughts
B. helped createlanguage in humans
C. respond instantlyto whatever is happening
题干中的核心信息mostdifficult应该在读题的过程中被考生捕捉到，在定位时应充分考虑到被代换的可能性;另外备考时训练充分有素的考生还会考虑到句子结构的整体顺序的不同。这样，当定位到原文的对应信息句：
Making a rapidemotional assessment of the events of the moment is anextremely demanding jobfor the brain, animal or human.
考生应该能够敏锐地发现extremelydemanding是mostdifficult的代换，由此确定该句所表达的意思是正确答案，在list中搜寻正确的选项时，句子中的内容被再一次代换，其中原文中 rapidemotionalassessment of the events被代换为respond instantly towhatever is happening,至此，答案为C。
Example 2:
It has been suggestedthat children hold mistaken views about the 'pure'science that they study atschool. 根据'pure'定位到文中第二段行Manystudies have shown thatchildren harbour misconceptions about 'pure' science,curriculum science.短短一句话我们可以发现有三组四处同义替换，分别为suggested-shown;hold-harbour; mistakenviews-misconceptions; science that they study atschool-curriculum science.因此答案为TRUE。
Example 3:
Some people maybelieve that the teacher- subjects behavior could beexplained as a positivesurvival mechanism.
可以看出句中positive和survival是关键词，由句中出现的survivalmechanism可判断为是从生物角度来谈论的，又因为原文的F段首句：Onesfirstinclination might be to argue that there are must be some sort of built inanimalaggression instinct that 中提到了相关内容，所以定位到该段。迅速扫描，搜寻和两个关键词对应的信息，除了在该段第六行出现了原词重现的survival,还在上一行出现了advantageous, 显然是positive的代换。由于原文跟题目中的信息吻合，所以答案是TRUE。
2. 不同词性的同义替换：
不同词性同义代换顾名思义，就是在代换时不受词性的限制，比如：obvious换成clearly; similar换成resemble等。
Despite substantialfunding, results (of this program) have beendisappointing.
代换为：This program failedalthough they received sufficient funding.
因为把disappointing换成了failed, although代换了inspite of,通过词的代换就会很自然的实现英文中提倡的句式多样性。
二、词组的转换
词组的转换一般情况下是同义词转换的一个衍生。当一个词无法用另一个同义词到位地解释时，可能会出现用词组解释的情况。另外如果本身就是词组的形式，那么通常来讲还是会用词组的形式进行解释。
原文：Computers are gainingin popularity, despite their cost.
题目：Computers are morepopular than they used to be.
原文当中的gaining in popularity题目中用morepopular than they used tobe作为替换。两者在意思上属于完全一致的同义转换，因此答案为TRUE。
原文：Biologically, aspecies becomes extinct when its last individualdies.
题目：In biological terms,a species is said to be extinct when only oneindividual exists.
原文当中的biologically用题目的inbiological terms作为替换。Become则由issaid tobe作为替换。但是原文当中的die在题目中变成了exist, 直接相反的意思。介于最后这一处的转换与原文信息不符，可以判断出此题答案是FALSE。
There were severalreasons for the research into plastics in the nineteenthcentury, among themthe great advances that had been made in the field of_____and the search foralternatives to natural resources like ivory.
解析：根据nineteenth century定位到文中第二段......Theimpetus behind the development ofthese early plastics was generated by anumber of factors- immense technologicalprogress in the domain ofchemistry,.......其中，in the field of意思等同于inthe domainof在....领域，因此答案为chemistry。
In recent years, manyof them have been obliged to give up their _____lifestyle, but they continueto depend mainly on _____ for their food andclothes.
解析：根据上下文定位到文中Overthe past 40 years, most have abandoned their nomadic waysand settled in theterritory's 18 isolated communities, but they still relyheavily on nature toprovide food and clothing. 因为大多数同学都认识abandon,更知道giveup是放弃的意思，属于单词与词组的替换，因此个空填nomadic,lifestyle生活方式与ways替换，dependmainlyon与rely heavily on属于词组与词组的替换，意为依赖......，答案为nature。
总而言之，从具体的单词到灵活的词组，同义替换贯穿于雅思考试的各个层面。希望通过上述从词到词组的实例分析，能够清晰地解答“雅思同义替换怎么替换？”这一核心问题。关键在于平时多积累、多练习，培养对同义表达的敏感度，从而在实战中快速识别与应用，有效提升答题的效率和准确性。
