连接文中上下句的词汇，即所谓的信号词，往往表示句子间的关系，有助于考生把握各细节间的相互关系。这些词主要有：

　　A、表示顺承和递进关系

　　例词：also, apart from, besides, moreover, furthermore

　　例句：The Victorian style of heavily ornamented interiors prevailed in middle-class homes in England and the United States during the latter half of the 19th century. Moreover, in both countries, techniques of mass production promoted the use of reproductions in many different styles.

　　B、表示对比与转折关系

　　例词：but, however, though, although, yet, nevertheless, on the other hand

　　例句：Education is the passport to modern life, and a pre-condition of national prosperity. But more than a quarter of the world’s adults cannot read or write, and more than 100 million young children are deprived of even a primary school education.

　　|C、表示相似关系

　　例词：like, as, likewise, similar to, in the same way

　　例句：Like other ways of generating electricity, wind power does not leave the environment entirely unharmed.

　　|D、表示时间先后关系

　　例词：now, later, before, after, since, when, first, second, next, at last, eventually, finally

　　例句：As the volunteers began to fall asleep, the electrodes detected the slow rolling eye movements which could be seen easily through their eyelids. Soon after, the volunteers fell deeper into sleep and their eyes became still.

　　E、表示排列次序

　　例词：another, the secondeven morethe most the best the least

　　例句：This situation is compounded by yet another factor.

　　F、表示因果关系

　　例词：as, because, for, since, owing to, thanks to, which in turn, lead to, as a result, result in, consequently, therefore, thus, hence

　　例句：As they became independent, most developing countries enthusiastically embraced education.

　　G、表示举例或说明关系

　　例词：that is to say, in other words, i. E. Such as, for example, for instance

　　例句：More recent developments such as those seen on California wind farms have dramatically changed the economic picture for wind energy.