转折关系：but, however, yet, on the contrary, contrary to, in contrast to, whereas, rather than, instead of, conversely
让步关系：although, even, despite, nevertheless, as, still, much as, anyhow, in any case, whatever
总分关系：for example(分), such as（分）, including（分）, in sum（总）, in general（总）, on the whole（总）
因果关系：because, due to, in that, owing to, since, now that, lead to, contribute to, result in, in view of, so, hence, therefore, consequently
递进关系：still, indeed, furthermore, besides, in addition, what is more
条件关系：if, in the event of, so long as, unless, only if ,in case, provided that,并列关系：and, as well as, likewise, not...only...but also...
时间关系：when, while, as, after, before, since, until, as soon as, once, simultaneously, at the same time, whenever
目的关系：so that, in order that, lest, for fear that,