我们知道语法中最常说的五大句型，那么大家知道五大句型的共同点有哪些呢，就是都必须至少一个主语，一个谓语，如果一个句子中出现两个谓语动词，则必须随之出现一个连接词，也就是说句子中谓语动词的个数一定比连接词的个数多一个。这也是SAT语法历年真题中必考的内容，下面小编就来为大家总结一下SAT语法中不完整句子的考察。
这里要严重题型大家的一点就是不完整句子中谓语动词额考察，谓语动词的考察一般是句子没有谓语动词或谓语动词不完整，SAT语法中通常会用一些非谓语动词还混淆大家的视线，那么大家要明确的是哪些词可以做谓语的动词，哪些是非谓语动词，谓语动词一般是由实意动词，be动词，动词短语等，非谓语动词一般包括三种形式，现在分词和过于分词，不定式，动名词， 考生做好这样的却分再加上真题的练习相信很快可以掌握这部分的用法。我们来看一下小编为大家总结的不完整句子的情况。
用从句来冒充主句成分
SAT语法中有一种不完整句子考察方式就是用从句来迷惑大家对于谓语动词的判断，句子中没有谓语动词而用从句来混淆，来看一道真题。
3. Several of the forest fires that occurred last summer which were because people are careless.
A. which were because people are careless
B. were caused by human carelessness
C. because people are careless
D. are because of human carelessness
E. happened from people being careless
解析:B，首先要来分析句子的结构我们找到主语是 Several of the forest fires，谓语动词缺失，那么我们就要从选项中补充谓语动词，B是正确的，D的are与时态不符，E中改变了句意。
谓语动词不完整
还有一种句子不完整的情况就是谓语动词不完整，比如助动词和情态动词是不能够单独做谓语的，需要与其他动词组成动词短语来充当谓语动词，下面来看一道真题。
1. The problem of copyright violation, frequently compounded in certain countries because the sale and use of copyrighted materials are not tightly controlled. (OG：第八套题)
A. violation, frequently compounded in certain countries because
B. violation, frequently compounded in certain countries and
C. violation, frequently compounded in certain countries when
D. violation is frequently compounded in certain countries where
E. violation is frequently compounded in certain countries so
解析：D，此题的考点是不完整句，谓语动词部分缺少了用于构成被动语态的助动词is，当答案范围圈定D和E时，就需要从where和so来下手了。通读题干，我们知道这里应该是因果关系，所以选择E。
双主语的情况
双主语的情况很简单，句子中出现两个主语的情况，本书句子已经表明了主语成分，但是后面的句子中又出现了主语的同义代词的情况也是错误的。
以上就是SAT语法中不完整句子的考察情况，大家是否都掌握了呢，接下来还希望各位考生多多练习，取得SAT语法高分哦。
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