1.增补(Addition)

　　in addition, furthermore, again, also, besides, moreover, what`s more,similarly, next, finally.

　　2.比较(Comparison)in the same way, likewise, similarly, equally, in comparison, just as

　　3.对照(Contrast)

　　whereas, in contrast, on the other hand, instead, however, nevertheless, unlike, even though, on

　　t he contrary, while

　　4.因果(Cause and effect)

　　because, because of, for, since, due to, owing to, thanks to, as a result(of), accordingly, hence, so, thus

　　5.强调(Emphasis)

　　certainly, above all, indeed, of course, surely, actually,

　　as a matter of fact, chiefly, especially, primarily, inparticular, undoubtedly, absolutely, most imprtant

　　6.让步(Concession)

　　although, though, after all, in spite of, nevertheless, still, provided, while it is true....

　　7.例证(Exemplification)

　　for example, for instance, that is, namely, such as, in other words, in this case, by way of illustration.

　　8.总结(Conclusion)