一、根据意思和作用的不同，过渡词可以分为以下十五类：

　　（1）表并列关系的过渡词:

　　and, also, as well, as well as, or, too, not only…but also, both … and, either … or, neither…nor

　　（2）表递进关系的过渡词:

　　besides, in addition（加之，除……之外）, moreover(此外，而且), what’s more, what’s worse

　　（3）表转折对比的过渡词:

　　but, however, yet, instead, on the other hand, on the contrary, although, different from, despite, in spite of, whereas, unlike, nevertheless, not only…but also, here…there, years ago…today, this…that, the former…the latter, then…now, the first… whereas the second, once…now, on the one hand…on the other hand, some…others

　　（4）表原因的过渡词:

　　because, because of, since, as, for, now that, thanks to, due to（由于）

　　（5）表结果的过渡词:

　　so, thus, therefore, as a result, so that, then, thereby, hence, so…that, such…that　

　　（6）表条件的过渡词:

　　if, unless, on condition that, as/so long as

　　（7）表时间的过渡词:

　　when, while, after, before, until, as soon as, later, afterwards, soon, lately, recently, since, from then on,　eventually, in the meantime, then, suddenly, at the same time, next, early this morning / year / century, after a while, in a few days, now, presently, finally, at last, all of a sudden, from now on, at present, immediately, the moment

　　（8）表特定的顺序关系的过渡词:

　　first, firstly, second, secondly, third, thirdly, above all, first of all, then, next, finally, in the end, at last, afterward(s)（后来）, meanwhile（几乎同时）, thereafter（在那以后）, last, finally, eventually（终于）

　　（9）表换一种方式表达的过渡词:

　　in other words, that is to say, to put it another way

　　（10）表进行举例说明的过渡词:

　　for instance, for example, like, such as

　　（11）表陈述事实的过渡词: