一般把连接词与连接语分为以下三类：

1.表明事件发生的时间顺序：
then, first, at once, next, after that, previously¹, while, when, the following day, etc.

2.表明文章的组织结构:
1)Listing:
firstly, in the first place, secondly², thirdly, my next point is, last/finally, etc.
2)Illustrating:
for example/ for instance, to illustrate³, an example/ instance of this is, let’s take….., take…. for example, etc.
3)Re-stating:
in other words, that is to say, to put it another way, let me put it this way, or rather, namely, etc.
4)Referring:
in this respect, in that connection, as we said, apart from this, etc.
5)Resuming:
to resume, to return to the previous point, getting back to the argument, etc.
6)Summarizing:
to sum up, in short, it amounts to this, what I have been saying is this, etc.
7)Emphasizing:
it is worth noting, I would like to direct your attention to, let us consider, we must now turn to, I shall begin by, etc.

3.表明作者的观点、态度
1)Introducing( or emphasizing) further evidence:
moreover, furthermore, in addition, what’s more, as well, etc.
2)Cause:
because (of), since, owing to, on account of, due to, as a result of, etc.
3)Effect:
as a result, hence, therefore, consequently, thus, so, etc.
4)Contrasting:
in / by contrast, on the contrary, on the other hand, nevertheless, whereas, while, yet, however, but, etc.
5)Comparison:
in like manner, likewise, in the same way, similarly, in comparison with, etc.
6)Purpose:
to this end, for this purpose, with this in mind, in order to, so that, etc.
7)Intensification:
indeed, in fact, in any event / case, at no time, to tell the truth, etc.