SAT语法难题详细解析

 书面语中只有whether表示“是否”，if不可以

 注意句子中前后面its和their是否对应

 短语若能简化却用复杂形式就算错，能简洁就简洁，简洁性原则（在不改变句意的前提下）

 找不到错误时，注意句子前后时态的一致性和固定搭配（介词的用法）

 注意以下结构：名词+介词+名词，如a newly formed organization of

homeowners and business people have…，错的！of 后面的名词全都可以忽略，谓语动词的单复数看介词之前的名词。



不能语义重复！！！！

 注意倒装时的时态、单复数一致，尤其是there be举行的be的单复数，由be后面的主语决定，如：Also supported (A) by the commission was (B) the

proposed health clinics and the proposed center (C) to distribute

information on job-training (D) opportunities. No error (E)答案：B

 若出现指代不明确的情况，有相同选项的如it，可以直接划掉多个选项。

 要注意with的出现很有可能跟前面的格式不匹配

 有两个动词在不同的时间时，早的那个要用完成时。

 完成时可以表示持续的动作。

e.g. RDX has been very nice to me. (was nice and still is nice)

 swim-swam-swum, run-ran-run

 优先纠正：句子完整性>句意完整性>是否有语法错>时态错>简洁性原则，修改句子时注意不能改变原句句意，即使会让句子变得累赘，如OC2Section6No.4

 平行形式 A, B and C 中一定是 and 连接，而不是 as well as

 This不可以单独充当主语或宾语

 注意指代不清的问题。同一句话中如果有they之类的，那么前面必须只有1个复数名词，否则会导致指代不清。that等同理。

 宾语从句 that 不省

 this/that 在SAT中指代整句话绝对是错误的

 没有 do it / them / that 只有 do so

 表示是否只能用 whether , 不使用 if 和whether ~ or not

 就近原则：there be句型, not only..., but also...; neither..., nor...; either...,

or...

 不要被句末多加的then之类的词误导，其实往往没错

 For后面要跟宾语形式，we要改成us，I改成me, she改成her，此次类推

 However, thus, hence, then, also, even不是conjunction，不能连接两个SVO，要加and或；

 时间词的重复（contemporary & of the period, annual & each year, etc.）

 Like来比较不能乱用，很可能变成illogical comparison，平行结构

 Rather than的两边格式、类别都是要一样

 如果某修饰词既可以修饰前面也可以修饰后面，那移动它的位置。

e.g. The oysters agreed on Sunday to go for a stroll with the walrus. (UNCLEAR)

e.g. The oysters agreed to go for a stroll with the walrus on Sunday. (CLEAR)  Nothing can be different from itself.

e.g. Lemon has posted more threads than CUUSers. (wrong)

e.g. Lemon has posted more threads than other CUUSers. (correct)

 搭配就近原则(not only/but also; neither nor; either or; not but)

e.g. Not only lemon but also I am a cuuser.

 （1）联合主语通常用复数。( noun and noun +verb-->pl.)如people, cattle, police,

etc.

e.g. Lemon and sat2400 are cuusers.

（2）联合主语指代一个事情的时候用单数。

e.g. Cecilia and Andy is the name of an ID.

（3）诡异的主语情况。

1.单数，medium, datum, phenomenon, criterion

2.复数，media, data, phenomena, criteria

（4）似复实单的情况。

如billiards, checkers; physics, statistics; measles, rickets; customs, news等等。

（5）分清真正主语(n1 of n2)

e.g. a pair of scissors is on the desk.

few, many, several为复数形式。

 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。

 注意！如果前面是个动词如: contaminated by sewage，后面则是which can

last for days….这个which不是指代sewage。Sewage不能last for days，而是contamination could last for days. 所以不能用which指代，而应该是明确使用contaminate的名词形式，contamination

 注意插入语的干扰（两个逗号之间）

 被动句很有可能是错的，因为没明确动作发出者！（加 “by” 就ok了）

 Because of doing和having doing后面跟过去式时，having doing往往正确

 Be more s.th of A than of B，不用在of B前加that之类的

 So much......................as （距离很远也要看清）

 Synonymous with，Synonym of/for

 Both和thus 重复，不能同时出现

 注意动词的分词短语的逻辑主语是否一致，即v-ing或v-ed出现时，注意该短语的主语的逻辑主语是否存在，或匹配如OC1Section7No.22、OC2Section6No2

Maya proudly wore her sister’s most popular invention, a watch for winter campers

that ……, and sends out a loud alarm when pressing a button,此处的pressing有错，句子中的任何成分都不能做pressing的逻辑主语。

 固定用法

 Be capable of, …be a threat to…, one of its kind, be impressed with,

 …so that…, so…that…, just as…so, had hardly…when, no sooner…than,

not…any more

 Mistrust of s.th, be particular above/over s.th, on the verge of…, advocate of/for…

 And so=and therefore,错的！

 Preventfrom, protest sb/s.th against, prohibit sb/s.th from

 ever since

 known to be s.b/known as s.b皆可

 Determine不加about, determine on s.th/to do s.th

 point to/towards s.th—All the evidence points to suicide.

 A as (adj) as B, C, D… （as..as的两边类比一样的事物，并且可以是母集和子集关系）

 Whereas = but, Whereby = by which, Thereby = as a result

 culminate in/with s.th

 certify sb as s.th, strike sb as s.th

 be desirous of s.th, s.th is desirable

 the reason....be that

 draw on/upon s.th —to use information or your knowledge of something to

help you do something,利用（信息）:

His novels draw heavily on his childhood.

She had a wealth of experIdentify Errsnce to draw on.

 In addition要在句首用.

 Subject to=depend on, yield to

We plan to go on Wednesday, subject to your approval. 此时subject为形容词

Moving all the books should not take long, subject to there being (= if there

are) enough helpers.

 注意！Because不能用is because之类的！一定要：（句子）,because（句子）



Reconcile s.th with

 Xxxx’s reasons are that..........and that.......... 因为有are,所以要跟2个或以上的that从句,这里的that不可省略！！

 Doing s.th……. is as (adj) as it is……. ，因为doing可以看成名词，所以要有同是名词代词的it

 So….as…. （so 和as距离远要看清）, Just as . . . so.

 Xxx is in A, not, as many people assume, in B.

 For all = despite ()

 At risk of doing s.th，At risk from

 A provides(或其他动词) xxx better than does B.，A provides(或其他动词) as

much xxx as does B.

 (形容词) because of …… but/and （形容词）because of ……

 在平行句，noun, noun, noun and 修饰语+ noun中，这个修饰语不影响平行结构