1、句间逻辑关系语篇中的句子并不是杂乱无章排列的，句子间通常具有一定的逻辑关系，主要有增补关系、比较关系、时序关系、解释关系和总括关系五类，而这种逻辑关系主要是由连接词来体现。下面我们结合课文一一分析。1.增补关系的基本作用是通过添加更多、更具体的信息将不同句子连接起来。常用连接词有additionally, also, and, as well as, besides, furthermore, moreover, too等。如：The truth was that the water from . Moreover, Snow was later able to show a link bet
2、ween .2.比较关系包括类比和反比两种。常用连接词有although, but, by contrast, however, instead of, like, rather, while, yet等。如：. the treat of cholera around the world saw a substantial decrease. However, cholera is still a problem.3.时序关系表示两个句子所传递的信息在时间上的先后次序。常用连接词有after, before, following, since, soon, then, until, when等
3、。如：Cholera used to be one of ., until a British doctor, John Snow, showed how it could be overcome.4.解释关系可进一步分为因果、手段、目的、条件、举例、换言六类。常用连接词有accordingly, as a result, because, consequently, therefore, for this reason, by, by this means, for this purpose, so that, in order to, if, in case, for example, t
4、o put it differently等。如：., but he still needed proof. Consequently, when an outbreak of cholera ., Snow began to investigate.5.总括关系包括总结、概括、下结论等，常用连接词有after all, all in all, in a word, in general, in short, in summary, in conclusion, on the whole, to sum up等。如：In general, doctors in those days had two contradictory theories .
