高考英语作文写作基础——过渡词 众所周知，要写出清晰流畅的文章，需要把文章中各部分巧妙地连接在一起。这样可使文章自然而别致，并能层层展开主题句，完整地表达中心思想。而过渡词（Transitional Words）是连接这些部分的纽带。
过渡词是一种关系指引词，一般由副词或起副词作用的短语承担。此外，代词、连词、上下文的近义词等也可作过渡词。过渡词能使文章启、承、转、合，融会贯通，连成一体。
一、过渡词的分类
1. 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 pite 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,