1.名词(包括代词)。单复数问题。
判断方法：对比主语跟宾语。主语跟宾语的单复数形式必须相同。也可能会根据谓语或者定语进行判断。下面是例题：
No matter when they came from or what their previous lifestyle is, the refugees were grateful for having been granted political asylum in the United States. No error.
请看what their previous lifestyle is这段话， their跟lifestyle的单复数不同，当然还有后面的is也一起错了。应该改成lifestyles are.
2.动词。主谓一致的单复数问题。时态错误。过去式的单词错误。时态错误主要发生在主句和从句的时态不一致。词汇错误就是有些不规则动词的过去式用错，比如常见的hang、rise等等，当然也有drove写成drived的。
判断方法：看到动词，要本能的反应是单复数、时态问题，如果都沒有就考虑词汇用错问题。
语法补习：
Neither…or…; Either… or…后面的谓语跟第二个主语保持一致。
…along with…; …as well as…; …in addition to…与个主语保持一致。
Both…and…就不说了，用复数形态。
3.固定搭配。动词与介词，比如look at。连词搭配，比如either…or…
判断方法：看到有介词划线就注意一下。这种题目平时积累很重要!
背固定搭配的时候一定要注意介词与不定式的区分问题!比如look forward to，to是介词，后面的动词要使用动名词形式。
4.代词。主格与宾格。指代不明。文中出现的多个代词不一致。
判断方法：代词是用来指代的。看到代词马上回头寻找其指代对象。
To become a world figure-skating champion like Kristi Yamaguchi, one must be so dedicated that you will practice six hours a day. No error.
这句话的问题在于代词使用不一致。请看one must be so dedicated that you will practice six hours a day，前面用的代词是one，但是后文使用的是you，再理解句意，不难发现两个代词其实是在指代同一个人。所以应该把you改成one.
5.平行并列结构。两个以上的分句并列时，一般美国人爱用并列结构，这样的好处是使文章看起来工整。
判断方法：出现多个并列成分;出现比如from…to…等类似的经典介词组合。注意：并列结构使SAT很喜欢考察的内容!
Each time Caroline turns on her computer, she has to enter a company code, then her initials, and then enters a password before she can begin working. No error.
读句子，发现这个女人工作之前要干3件事：enter a company code, enters her initials, enters a password，这3个动作构成了并列。题干已经有提示：she has to enter a
company code, then (enters)her initials, 所以剩下来的enters毫无疑问也应该省略即改成and then(enters)a password before she can begin working A talented and versatile artist, Twyla Tharp has been a dancer, choreographer, and collaborated on various productions. No error.
还是并列结构，改成has been a dancer, choreographer, and collaborator.这样的句子就很整洁了。写作的时候可以用上的。
6.形容词与副词混淆。判断：看到以后注意就行了。
Although the new device was the most clever designed bird feeder that Ms. Rodriguez had ever owned, it could not keep squirrels from stealing the birdseed. No error.
用Word一看就知道哪里有错了……clever designed里头，designed是动词，clever是修饰designed的。但是修饰动词的只有副词，所以毫无疑问要将clever改成cleverly.
7.逻辑。双重否定。
8.同级比较。比如My pen in more beautiful than you. Pen跟you并不是同一类事物。
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