1.主谓 一致方面的错误改错行中出现谓语动词时，就要找出它的主语，看看 句子的主语和谓语在人称和数上 是否一致这方面的问题是改错题型中最为常见的例如：Business today ,whether it‘s running a little gas station or a big factory,take good management.应把 take 为 takes例句中 whether 与 or 搭配完全正确，因此可以把焦点放在谓语动词 上，结果就发现它与主语 business 在数上不一致，这样问题迎刃而解了Sixty inches,according to John,are the average height in his family.应把 are 改为 is表示度量、时间等复数名词作主语时，常把这些复数名词看作一个整 体，谓语动词应用单数形式2．谓语动词时态、语态方面的错误这方面的问题主要包括用 及物动词和不及物动词以及时态和语态方面的误用例如：John has lived in that house for five years when he decided to move to New York.应把 has lived 改为 had lived 。
因为 lived 的动作发生在 decided 之前，发生在过去的 两个动作，先发生的用过去完成式，后发生的用一般过去式The reason for all the changes being made has not explained to us yet.应把 has not explained 改为 has not been explained因为例句中的主语 reason 是被解释的对 象，是受事者，所以应为被动语态，3．非谓语动词的用法错误非谓语动词包括动词不定式、动名词和分词在改错测试中，要求判断是用不定式、动 名词还是分词，特别是分词作定语一看到句子中有分词（现在分词或过去分词），就要 判断这个分词是表示主动还是表示被动；是表示现在还是表示过去；是该用现在分词还是 过去分词例如：Police records show a surprised link between changes in the season and crime patterns.应把过去分词 surprised 改为现在分词 surprising 作定语，表示主动的意思，“令人吃惊 的联系“He was an optimist convinced that life was worth living for its own sake ,and he could see no reason for looking forward to die as a release.应把 to die 改为 to dying。
因为这里的 to 是介词，其后应跟名词或动名词4．虚拟语气的用法错误随着说话人意图的不同，动词需用不同的形式但凡提到虚拟语气，都与谓语动词的形式 有关，所以一定要注意用正确的谓语动词形式例如：Had Paul received six more votes in the last election,he would have been our chairman now.应把 would have been 改为 would be这是个错综条件句，主句和从句属不同的时间范畴The committee members propose that the plan is postponed for a few days.应把 is postponed 改为 be postponed这是虚拟证据在宾主从句中的应用像 propose 这类 词 request,advise,prefer,urge,order,insist,desire,move,recommend,suggest,demand,require,determine 等出现在主句里，其从句中的谓语动词一定要用虚拟语气，表示要求、 建议、命令、提议、 意愿等。
5．形容词、副词的用误用主要指在该用形容词的地方用了副词，该用副词的地方用了形容 词改错行中出现形容词或副词时，就要分析该形容词或副词修饰什么，形式是否正确， 是原级，比较级还是最高级例如：Apparently our intellectual seasonal cycles are complete different from our criminal tendencies.应把 complete 改为 completely例句中副词 apparently 状语，用法正确但 complete 修饰 different，用法错误，该用副词 completely.This book is very more difficult than the one I recommended for you .应把 very 改为 far 或 much，比较级前可用 much,far,still,a little,a bit 来修饰，起加强语气或 缓和语气的作用，但不能用 very6．代词的用法错误代词误用主要是要求判别代词同它所指代的词不达意在单复数、格或人称上是否一致；指 代什么，用法是否正确；以及作为形式主语或形式宾语 it 的用法错误。
例如：In most places the jungle rooftop is so thick that this is impossible to see the sun or the stars.应把 this 改为 it .它在句子中作形式主语I t was him who came running into the room with the news.应把 him 改为 he 在强调句 “It was + 被强调的部分+ that 中，被强调的部分应与后面真 正的主句保持人称和数的一致，这里被强调的部分在主句中作主语，所以应用主格代词7．连接词的用法错误连接词的误用主要指连接词用得是否正确，是否符合句子意思；连接的是词还是句子，是 否符合逻辑关系；还要特别注意混淆连接词的用法，例如：It would be interesting to discover how many young people go to university without any idea of that they are going to do afterwards.应把 that 改为 what 。
what 引导宾语从句作 of 的宾语又在宾语从句中作 do 的宾语，而 that 则不能The tourist got to the resort so early therefore the clerk there wasn’t even up yet.应把 therefore 改为 that. So that 表示“如此-----以致于------“that 引导出结果状语从句8．介词（固定搭配）方面的错误介词的误用主要指介词与动词、形容词、名词的搭配、介词惯用词组等是否正确例如：We feel uncomfortable if our clothes do not look right ---if they are not similar with those which other people of our age , sex, country and period are wearing应把 similar with 中的 with 改为 to 因为 similiar 与 to 搭配,构成固定短语 be similar to ， 意为“ 类似的“Of the best of my knowledge. he did very well in his previous job.应把 Of 改为 To ，构成固定词组 t o the best of one‘s knowledge ，意为“就某人所知“。
9．易混词的用法错误易混词的误用主要指在意义，概念上容易混淆、用错的词以及单词单复数形式方面的错误 如 such 与 so, ago 与 before,as 与 like,between 与 among,etc.Of course the press means more than newspapers. Avast amount of magazines are published, aimed at readers interested in all sorts of subjects.应把 amount 改为 number，因为 amount 只与不可数名词连用Today ,flint has small importance as an industrial product.应把 small 改为 little small 用于表示人或物的体积尺寸，不能修饰抽象名词10．词义语义方面的用法错误词义的误用主要指词义语义的重复或句子意义不完整例如：The creation of mobile extremely greatly extended the limits of the art of sculpture.extremely 和 greatly 意义重复，属赘词，应把 extremely 省去。
Despite the fact that south Pole is as snow-covered and stromy weathered as the North Pole,Is colder than the North Pole.显然是句子意义不完整，在 is colder 之前缺少主语 it (the South Pole),应该补上。