大学英语中常用的衔接词可以分为以下几类：
表示顺序的过渡词
first, then, finally
in the past, now, at present, in the future
gradually, suddenly, immediately
next, in a few days, after a while
表示时间的过渡词
now, then, before, after, afterwards
earlier, later, immedately, soon
in a few days, gradually, suddenly, finally
表示空间顺序的过渡词
near（to）, far（from）, in front of, behind, beside, beyond
above, below, to the right/left, around, outside
表示比较的过渡词
in the same way, just like, just as
similar to, different from
表示转折的过渡词
but, however, on the contrary, in the mean while
at the same time, instead, unfortunately, after
still, yet, nevertheless, nonetheless
表示因果关系的过渡词
because, since, so, as a result, therefore
then, furthermore, otherwise
表示目的的过渡词
for this reason, for this purpose, so that, in order to
表示强调的过渡词
in fact, indeed, surely, necessarily, certainly
without any doubt, truly, to repeat, above all
表示解释说明的过渡词
for example, in fact, in this case, for actually
for instance, to illustrate, by way of example
表示总结的过渡词
in a word, above all, all in all, finally
at last, in conclusion, as I have shown, in another word
in short, in general, on the whole, as has been stated
这些衔接词可以帮助学生更清晰、连贯地表达思想，使文章结构更加紧凑和有条理。在写作时，合理运用这些衔接词能够提升文章的可读性和表达效果。