SAT语法核心难点突破指南
在SAT语法备考过程中，识别高频易错点能显著提升答题准确率。以下通过典型例题解析，重点剖析六大常见语法陷阱。
主谓一致性难题解析
复杂句式中的主语常被修饰成分隔断，需特别注意动词形态。例如："The group of students, along with their professor, (is/are) attending the conference." 正确选项应为单数形式is。
| 错误类型 | 典型错误 | 修正方案 |
|---|---|---|
| 倒装结构 | There is many books on the table | There are many books |
| 复合主语 | Either Tom or his friends is coming | Either Tom or his friends are coming |
代词指代双重陷阱
定语从句中需保持指代对象一致性，特别注意those与that的区分应用。例如："Students who complete the course will receive certificates that (confirm/confirms) their achievements." 正确动词应为confirm。
介词搭配黄金法则
掌握固定搭配规律至关重要，如approach后接to，而ability需搭配of。注意对比记忆："She has the ability (of/in) solving complex problems" 正确介词应为of。
词性混淆警示录
特殊变化的形容词与副词常成考点，如fast本身可作副词，无需加-ly。需警惕类似"sudden"与"suddenly"的用法差异。
逻辑连接关键要素
独立分句间必须使用连词衔接，对比分析："He studied hard, (however/therefore) he failed the exam." 正确应选用however并添加分号：He studied hard; however, he failed.
平行结构规范解析
比较对象需保持语法成分一致，注意rather than的规范用法："Prefer reading (to watch/watching) movies" 正确形式应为watching。
特别提示：
- 遇到长难句时先提取主干成分
- 比较级结构中避免双重否定
- 虚拟语气需注意时态倒退原则
