根據意思和作用的不同，過渡詞可分為十五類
(1)表並列關係的過渡詞：
And, also, as well, as well as, or, too, not only…but also, both…and, either…or, neither … nor…
(2)表遞進關係的過渡詞：
Besides, in addition, moreover, what's more, what's worse
(3) 錶轉折對比的過渡詞：
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) 表原因的過渡詞：
Because, because of, since, as, for, now that, thanks to, due to
(5) 表結果的過渡詞：
So, thus, therefore, as a result, so that, then, thereby, hence, so… that, such…that
(6) 表條件的過渡詞：
If, unless, on condition that, as/so long as
(7) 表時間的過渡詞：
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, currently, immediately, the moment