每周一讲|主谓结构
今天·，聂老师给大家讲解的知识点是：主谓结构。
方
主谓结构是SAT文法部分常考的一个考点，解答这类题目最直接的方法就是找主干，找主谓。
常出现的错误有：
1.run-on sentence (直接用逗号连接两句子）
Eg. She eats a lot, she is not fat.
2.缺主语
Eg. Eats a lot.
3.缺谓语
Eg. She eating a lot.
4.多主语
Eg. Lucy, she eats a lot.
5.多谓语
Eg. They are overarching objectives were to be employed.
6.从句单独使用,缺主句
Eg. As she is a good student.
下面以一道OG题为例：
According to Box, a leading Greenland expert, tundra fires in 2012 from as far away as North America produced great amounts of soot, some 17 of it drifted over Greenland in giant plumes of smoke and then fell as particles onto the ice sheet.
17. A) NO CHANGE
B) soot
C) of which
D) DELETE the underlined portion.
解析：
本题考查主谓结构。
A，B，D选项中直接用逗号连接两个完整的句子，构成了run-on句，故排除。
C选项主干是tundra fires....amounts of soot, 后面接了一个由which引导的定语从句修饰前面的soot，句子结构没有问题，故选C。
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