本期重点: 平行结构

  平行结构错误主要指在并列连接词and前后语法结构不对等、不平行。其它并列连词还有but, as well as, or, or else, both … and, neither … nor, either … or, not only … but (also)等可连接两个对等的词和对等的结构。

  考点例析

  1:Computeranalyzed marketing reports can help deciding

  which products to emphasize now,which to develop for

  the future, and which to be dropped.? ____________

  解析:本句中三个平行成份which products to emphasize now, which to develop和which to be dropped结构模式应该一致,均采用不定式主动语态,因而to be dropped应改为to drop。(注:在四六级考试中,短文改错只能修改、删除或添加一个单词,不能同时改动两个。本例题旨在反映平行结构的语法性质。)

  例2:At the heart of the NEA survey is the belief that our

  democratic System depends on leaders who can think

  critically, analyze texts and writing clearly. ___________

  解析:can后面有三个并列的谓语动词,因此writing应改成与think, analyze并列的动词原形write。

  例3:Atrophy is a decrease in size of a cell, organ, tissues, or other part of the body. _______

  解析;:并列连词or连接四项名词结构,其中cell 和organ皆为单数形式,故tissues应改为单数tissue。

  巩固与拓展

  1.A majority of the reports received from people claiming

  to have seen the lengendaiy Loch Ness monster have

  proven to be mistakes, misconceptions, or tricked. ___________

  2. Your semester grade is based not only on how well you

  do on each test, but also how you participate in class. ___________

  3. Modern sience was born when Galileo began trying to explain

  how things happen and thus originating the method of controlled __________

  experiment which now forms the basis of scientific investigation

  4. Restrict your self to one or two pages, and listing ___________

  any publications or referees on a separate sheet.

  5. The House proposal would have barred the federal

  government from demanding library records, read lists, __________

  book customer lists and other material in terrorism and

  intelligence investigations.

  综合改错

  The biggest safety threat facing airlines today may not be a terrorist

  With a gun, than the man with the portable computer in business class. 1._____

  In the last 15 years, pilots report well over 100 incidents tha could 2. _____

  have been caused by electromagnetic interference. The source of this

  interference remains confirmed, but increasingly, experts are pointing the 3._____

  blame at portable electronic devices such as portable computers, radio and 4. _____

  cassette players and mobile telephones.

  RTCA, an organization advertises the aviation industry, has 5. ______

  recommended that the airline bans such devices from 6.______

  used during “critical” stages of lignt, particularly take-off and landing. 7._______

  Some experts have gone further, calling for a total ban during all flights.

  Currently, rules on using these devices are left up to individual airlines.

  And although some airlines prohibit passengers from using such equipment

  during take-off and landing, most are willing to enforce a total ban, given 8. ______

  that many pasengers want to work during flights.

  The difficulty is predicting how electromagnetic fields may affect an

  aircraft’s computers. Experts know that portable devices emit radiation

  which affect those wavelength which craft use for navigation and 9.______

  communication. But , because they have not been able to reproduce

  these effects in a laboratory, they have no way of knowing

  whether the interference might be danger or not. 10.______