4. 连接词衔接

　　英语里面表达句与句之间的逻辑关系通常会用到连接词，同学们除了要知道连接词的意思，还要知道连接的两个句子是否存在相应的逻辑关系，所以这种方法相对前面几种是比较难的。常考连接词有表转折，原因，结果，递进等。

　　█Modern architectural forms generally have three separate components comparable to elements of the human body; a supporting skeleton or frame, an outer skin enclosing the interior spaces, equipment, similar to the body’s vital organs and systems. █The equipment includes plumbing, electrical wiring, hot water, and air-conditioning. █Of course in early architecture—such as igloos and adobe structures—there was no such equipment, and the skeleton and skin were often one. █

　　Look at the four squares [█] that indicate where the following sentence could be added to the passage.

　　However, some modern architectural designs, such as those using folded plates of concreter or air-inflated structures, are again unifying skeleton and skin.

　　插入句子中的however表示转折，前后意思相反或者对比。最后一句话in early architecture对应插入句子modern architectural designs, 所以选择最后一个黑色方框。

　　句子插入题经常出现的转折关系词有：however, but, yet, whereas and while etc.

　　■Because they are always swimming, tunas simply have to open their mouths and water is forced in and over their gills. ■Accordingly, they have lost most of the muscles that other fishes use to suck in water and push it past the gills. ■In fACT, tunas must swim to breathe. ■They must also keep swimming to keep from sinking, since most have largely or completely lost the swim bladder, the gas-filled sac that helps most other fish remain buoyant.

　　Look at the four squares [■] that indicate where the following sentence can be added to the passage.

　　Consequently, tunas do not need to suck in water.

　　Consequently是表示结果的逻辑关系词。整句话意思是所以金枪鱼不需要在水里吮吸。段落第一句意思：因为金枪鱼的游动从不停止，它们必须张着嘴使水流经它们的腮。根据两句话的逻辑意思，因为它张着嘴使水流经它们的腮，所以不需要在水里吮吸。同学们不仅要理解consequently的意思，还要理解前后两句话的意思才能做对此题。答案选第二个黑框。

　　表示结果的逻辑关系词有：consequently, therefore, so, hence and thus etc.

　　It has long been accepted that the Americas were colonized by a migration of peoples from Asia, slowly traveling across a land bridge called Beringia (now the Bering Strait between northeastern Asia and Alaska) during the last Ice Age. ■The first water craft theory about the migration was that around 11,000-12,000 years ago there was an ice-free corridor stretching from eastern Beringia to the areas of North America south of the GREat northern glaciers. It was the mid continental corridor between two massive ice sheets-the Laurentide to the west-that enabled the southward migration. ■But belief in this ice-free corridor began to crumble when paleoecologist Glen MacDonald demonstrated that some of the most important radiocarbon dates used to support the existence of an ice-free corridor were incorrect. ■He persuasively argued that such an ice-free corridor did not exist until much later, when the continental ice began its final retreat. ■

　　Look at the four squares [■] that indicate where the following sentence could be added to the passage.

　　Moreover, other evidence suggests that even if an ice-free corridor did exist, it would have lacked the resources needed for human colonization.

　　Moreover表递进，可译为“此外”，插入句子意思和段落最后一句话表递进关系，译为：他令人信服地主张那样的不冻地带直到很久以后才出现，那时大陆冰块开始最后的消退。此外其它证据表明即使不冻地带存在，所以答案选最后一个黑色方框。

　　5. 观点+例子

　　这种连接的方法往往插入的句子是作者表达的观点，那么我们只要回段落找相关的例子就可以选择正确的方框了。

　　The differences in feeding preferences lead, in turn, to differences in migratory habits. ■The wildebeests follow, in their migration, the pattern of local rainfall. ■The other species do likewise. ■But when a new area is fueled by rain, the mammals migrate toward it in a set order to exploit it. ■The larger, less fastidious feeders, the zebras, move in first; the choosier, smaller wildebeests come later; and the smallest species of all, Thomson’s gazelle, arrives last.

　　Look at the four squares [■] that indicate where the following sentence could be added to the passage.