衔接词是用于句与句或段与段之间表示起承转合的词汇。就像点成线，现成面，面成体一样，文章中恰当的运用好的衔接词不仅可以表现起承转合，还可以增强文章的立体感，突出文章层次感和逻辑性。这样利于不仅我们表达，也有利于使阅卷老师顺畅地阅读考生的作文，制造清晰的得分机会。
英文衔接词如下:
1.增补(Addition)
in addition,furthermore,again,also,besides,moreover,what's more,similarly,next,finally
2.比较（Comparision）
in the same way,similarly,equally,in comparison,just as
3.对照(Contrast)
in contrast,on the other hand,instead,however,nevertheless,unlike,even though,on the contrary,while
4.因果(Cause and effect)
because,because of,for,since,due to,owing to,thanks to,as a result(of),accordingly,hence,so,thus
5.强调(Emphasis)
certainly,above all,indeed,of course,surely,actually,as a matter of fact,chiefly,especially,primarily,in particular,undoubtedly,absolutely,most importantly
不仅是英语写作，各种作文中衔接词的运用都是凸显文章脉络的节点，使文章充满逻辑性，读起来会觉得整齐有条理而不是读完后毫无头绪。
衔接词英语是cohesion。
衔接词（cohesion）是连接两个句子的过渡词。衔接词一般用于连接同一句子中的两个部分或同一段落中的两个句子。例如，“however”、“nevertheless”和“yet”等词语可以用来表达转折关系，将同一句子中的前后两个部分联系起来，使文章更加连贯。
而“for example”、“in other words”和“that is to say”等词语则可以用来解释、说明或举例，将同一段落中的不同句子联系起来，使文章更加清晰。
表示层次性的衔接词：
1.衔接词：
(1)首先：firstly,to begin with;in the first place;in the first instance
(2)其次：secondly,in the second place;then
(3)最后：last but not the least;finally;at last;in the end;lastly
(4)此外：what's more,besides;moreover;furthermore;in addition
2.例句：
eg:To begin with,I’d like to extend my gratitude to all distinguished guests.
首先我想对各位尊贵的来宾表示感谢。
Firstly,it's too expensive,and secondly,it's not sturdy.
首先，它价格太贵，其次，它不耐用。
Lastly,I would like to thank my parents for all their support.
最后，我想感谢父母对我的全力支持。