在sat考试中,sat语法贯彻了整场考试,它的重要性不言而喻。所以想要sat得高分，sat语法一定要过关。今天小编主要给大家分享SAT考试的重点语法，希望对你们有帮助!
SAT考试的重点语法
1. 简洁原则
because 比because of，aware of， considering;主动>被动;直接>间接;动词〉名词。
2. run on 句型
SVO，SVO
两个句子相连：SVO，conj SVO 或者SVO;SVO
副词和介词不能连接两个句子：SVO，adv SVO 或者SVO，prep SVO
adv：①以ly 结尾的词;②词根判断法;③however, thus, hence, then, also, even
练习：
SVO, thus SVO. SVO, however SVO.
SVO, but SVO. SVO, although SVO.
SVO; therefore SVO. SVO; but SVO.
SVO; although SVO.
3. 逻辑主语Logic subject
doing/done ··· ，SVO. adj./adv. ，SVO
4. having，being
自杀词：在句子中充当时态的组成部分。
正确：放在句首大写。
5. 时态tense
6. 单复数singular & plural
5、6 常常合在一起考，从动词开始划线
7. 平行结构parallel structure
① doing, doing, and doing / 名词，名词，and 名词
② 两者之间的平行
③ 同类相比较
8. 固定用法
so that， just as… so， had hardly…when，no sooner…than，…not… any more…
9. 双主语
N SVO / N, SVO / N, S, VO。
10. 同位语优先
主语，…，VO
11.代词pronoun(it, they, their, which, that)
①singular & plural;
②不能pro-verb, per-sentence;
③不能pro-none;
④ambiguous usage;
⑤一个句子有两个同样的指代，成立前提是必须指代同一内容―― plague 原则
12. S，…，V+O
错误用法：S, ... , doing+OS, ... , which / that +OS, ... , and +v. +OS, ... , he / she +v.+O
常考SAT语法结构讲解
主谓一致(Subject verb agreement)
尤其是用于倒装时，比如there be句型或地点状语至于句首的倒装情况，一定要找到真正的主语。通常一套writing里总会有一个倒装句，并多为动词部分出错。
有插入语时，要勇敢的抛弃非中心部分，找到中心的主语。
主谓一致还会出现在一些固定用法中，但一般比较简单，比如a number of + noun(复) vs. the number of + noun(单), 面包黄油，刀叉等等。
就近原则：there be句型, not only..., but also...; neither..., nor...; either..., or...
特殊名词："人群牛群警察群"单数名词作复数。(people, cattle, police)
文学性的总称都是不可数名词。E.g. literature; poetry; prose.
平行结构(parallel structure)
注意and, or和but的用法。to well to是用于连接两个并列的结构。
另外尤其注意，在比较结构中，中心一定是同类相比较。
A, B, and/or C形式的正确用法是，A, B, C可以是单词或短语，并且一定都是同一形式的，如都是名词，或都是动名词短语。
形容词副词(adjective &adverb)
常考考点：形容词副词的混用及他们的比较级最高级。
Adj只可以修饰名词，adv则可修饰除名词外的大部分词。er和more都可以表示比较级，但二者不可同时出现。
比较级和than要同存同亡(必须一起出现)。
另外，副词不可以连接两个并列的句子，例如whereby。
Tips: 形容词的应用范围不如副词广，通常比较容易是出错的地方。
逻辑主语(logic subject)
当分词或者形容词放在句首，一定要考虑它的主语问题。这种情况下，主语通常是人而不是物，而且是发出句首分词描述的动作的那一个。
句型：Ving/Ved, S + V + O
特殊句型：when/while/to + adj, S + V + O
这个特殊句型是when/while/to + S + be + adj, S + V + O的简略形式。但只有当一个句子满足以下条件时才可以省略从句中的主语和谓语。
条件：a. 主句和从句用的是同一套主谓。
b. 从句中有be动词。
E.g. When she wto young, she killed many men. (她年轻的时候迷死了很多男人)可以省略为When young, she killed many men.
名词和代词(pronoun &noun)
常考考点：名词单复数混淆;男女混淆;主格宾格混淆(宾格用于动词宾语，介词宾语和补语)
也会在their, it和they之间指代不明。(在后面修改句子的笔记中详细说明;挑错题一般只考单复数对应，很少考到指代不明。)
关于指代，跨段之间不能指代;it不能指代整个句子，只能指代一个名词或动作;one和they之间，one和you之间都不可以相互指代。
另外，this不能单独充当主语和宾语，一定要有其他的名词和它在一起。
反身代词(oneself)不能单独作主语。
常用指示代词：which, that, who, whom, whose
其中that不可以引导非限定性定语从句(即逗号后的定语从句)，并且只有当that在从句里作宾语或表语时，that才可以被省略。
E.g. This is the caf that we always go to. 这句话中that是go to的宾语，所以可以省略为 This is the caf we always go to.
时态(tense)
常考考点：时态的混用，多为过去完成时和一般过去时的混用，现在完成时和一般过去时的混用。
Common mistake: have + 过去式(应为过去分词)
固定搭配(这个就需要平时的积累了)
如果一个题有一项是在固定搭配的词组下划线，并且没有错，那么一般这个句子就没有错。
SAT语法中逻辑主语问题的常见形式
1. 句子以现在分词开始
例如，Lacking good instruction, my mistakes in creating a graph to illustrate historical trends were numerous.( 句子以现在分词lacking开始)
(A) my mistakes in creating a graph to illustrate historical trends were numerous
(B) I made numerous mistakes in creating a graph to illustrate historical trends
(C) there were numerous mistakes in the graph I created to illustrate historical trends
(D) I created a graph to illustrate historical trends with numerous mistakes
(E) The graph I made for illustrating historical trends had numerous mistakes
2. 句子以过去分词开始
例如，Carried by the strong, dry winds of the stratosphere, the 1980 eruption of Mount Saint Helens caused dust thatcrossed the United States in three days and circled the globe in two weeks. (句子以过去分词carried开始)
(A) the 1980 eruption of Mount Saint Helens caused dust that
(B) Mount Saint Helens’ eruption in 1980 caused dust that
(C) dust from the 1980 eruption of Mount Saint Helens
(D) dust from the 1980 eruption of Mount Saint Helens that
(E) there was dust from the 1980 eruption of Mount Saint Helens and it
3. 句子以介词加分词开始
例如，By simply entering an internet website or calling a toll-free number, a catalog order can be placedfor almost anything from cheesecakes to fully equipped desktop computers. (句子以介词by加分词entering…or calling…开始)
(A) a catalog order can be placed
(B) by placing a catalog order
(C) they will place your catalog order
(D) you can place a catalog order
(E) your catalog order can be placed
4. 句子以连词加分词或形容词开始
例如，While driving down the road, the house with the large yard and small pond attracted the family’s attention. (句子以连词while加分词driving down…开始)
(A) the house with the large yard and small pond attracted the family’s attention
(B) the house having the large yard and a small pond attracted the attention of the family
(C) the house with the yard and small pond was attractive to the family’s attention
(D) the family’s attention was attracted by the house with the large yard and small pond
(E) the family was attracted to the house with the large yard and small pond
