解题要点 这类题型主要分面布在written Expression (16-40题中) 当A、B、C、D四项选择中出现单独的and或but 或or 时,它通常就是此题的焦点,应根据句意判断此连词是否用错。
全真例题要分析
(1) Harvesting of grains is affected by annual changes in temperature or in the amount of moisture, but both. (90.1)
D 根据句意,这里并无转折关系。因此but 应改为or.
(2) Porcelain is not a single clay, and a compound of kaolin. Ball clay, feldspar. And silica. (91.1)
C 此句表达的是一个取舍关系,and应改为but. “not but”是表达转折,到舍含义的固定并列连词搭配。
3. The structure or behavior of many protozoans are amazingly comples for single-celled artimals.
A 根据句中复数谓语动词are 来判断,连词or是错误,它表述的概含是两项之一,应用单数第三人称动词。固而or应改为and.
(4) Cayenne popper comes from the seedpot of the pepper plant which is dried or then ground.
D 根据提示词then,我们可以判断dried 和ground (grind 的过去分词,碾碎)是顺序先后的两个动作,并非取舍选择关系。固此or应改为and.
2. 并列连接词词组
both and as as
not only but also not so as
either or the same as
neither nor 比较级(more-re) than
so that to to常与so that
whether or 混淆搭配
解题要点;上述并列连词词组和短语必须搭配使用,不能承意更换或省略。考题中如出