并列结构。

这主要是指由and或or连接的几个并列成分在形式上必须保持一致.这一考点在历年六级改错中出现频率相当高,同学们要给予相当的重视.

(1) At the heart of the NEA survey is the belief in(改成that,同位语从句)our democratic system depends on leaders who can think critically, analyze texts and writing clearly.(07年1月新六级改错第6题)这里的writing显然与think和analyze并列,因此应该用同样的形式,所以应该改成write.

(2) Their experiments have shown that reading disorders are most likely the result of what is, in an effect(去掉an,固定介词搭配)，faulty wiring in the brain-----not lazy, stupidity or a poor home environment .( 06年6月六级改错第4题)这里的lazy应该与stupidity和a poor home environment并列,因此该用名词形式laziness.

(3) Restrict yourself to one or two pages, and listing any publications or referees on a separate sheet.(06年1月六级改错第7题)通过and将restrict和listing联系起来表示并列关系,所以listing应该用原形list.

(4) How do you know how to act in a classroom, or a department store, or toward a person who smiles or laugh at you?(04年6月六级改错第9题)

这里的smiles和laugh肯定应该用同样的形式,而前面的a person又提示我们该使用第三人称单数,所以将laugh改成laughs.

(5)Most experts believe this can continue even as if(去掉as,这里的even if表示即使)the population doubles by the mid-21st century, although feeding 10 billion people will not be easy for politics, economic and environmental reasons.(04年1月六级改错第6题)同样,这里的politics应该改成political和 economic, environmental并列。

（6）Elsewhere, rice experts in the Philippines are producing a plant with few stems and more seeds.

(04年1月六级改错第9题)few应该与more形成对应,所以应改成比较级形式fewer.
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