（i）并列与递进：and, or, also，neither…nor…, either…or…, likewise, similarly, equally, in the same way, that is to say ,as well as, the same …as, besides, additionally, furthermore, moreover, in addition to ,what is more
（ii）因果：because, for, since, as, thus, hence, therefore, so, so…that, consequently, accordingly, due to, thanks to, as a result, because of, in that, for this reason, of course
（iii）转折让步：but, however, yet, on the contrary, by contrast, on the other hand, unfortunately, while, whereas, unlike, rather than, instead of, it is true that, of course, although, though, even though, even if, nevertheless, despite, in spite of
（ii）时间顺序：afterwards, at first, at last, finally, first, firstly, in the first place, to start with，in the meantime, last, later, next, second, secondly, then, third, thirdly, to begin with以及一些具体的时间。
