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sat 语法题.求具体分析

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sat 语法题.求具体分析
(a.Whereas ) their friend Sean, who often behaved (b. as if) he had only one day left to live, Rob and Darrin ( c.rarely) acted without (d. first considering) the consequences. (e.No error)

(A)
(B)
(C)
(D)
(E)

Correct Answer: A
Here's Why:
The error in this sentence occurs at (A), where inappropriate word choice creates a sentence fragment (the sentence has no main verb). To fix this problem, “Unlike” should be used in place of “Whereas.”
Question Type: Identifying Sentence Errors
为什么a错了.应该如何用 whereas
sat 语法题.求具体分析
供参考
whereas 是connective
即是接连词
(1)放在dependent clause(子句﹖)的前面
与主句连接
在原帖的句子中
意思上(不是语法)是可以用 whereas
因为有‘相反’的意思
但语法上就有错误
请细看(1)
whereas是用於子句上
而子句应当有(a)主语及(b)动词
Whereas their friend Sean,who often behaved as if he had only one day
left to live,...
如果这是子句的话
主语将会是 their friend Sean
但动词却没有
who(主语) 取用 behaved (动词)
he (主语) 取用 had (动词)
所以除了用unlike来取代 whereas之外
这里还有另一个简单的修改
就是取消 who
Whereas their friend Sean often behaved as if he had only one day left
to live,...
那麼
Sean (主语) 取用了 behaved (动词)
变成了一个原整的子句
再问: whereas是否要连接两个句子呢?
再答: 是的 原句就是错在这里 用上whereas 句子的基本结构将会是 主句 + whereas 从句 或 whereas 从句 + 主句 这里虽然说是‘从句’ 但从句本身也可以的复杂句子 原文的‘从句’就是complex sentence 当中本身也有 '主句' 及 2个从句( who...及 as if...) 只是主句本身不完整 少了个动词 如果按照省去 who 的改法 则在这个从句中的主句便会完整 而这个从句中的从句则灭少至1个 unlike 则後面跟个 object 便可以