常用连接词：
表选择关系或对等关系的连接词：either…or…，neither…nor, or, as well as…, and, both…and…。
表因果关系或对等关系的连接词：therefore, so, as a result, as the result of …，because of, due to …,owing to, thanks to等。
表时间顺序的连接词：the moment, as soon as, at first, then, later, meanwhile, at the beginning, in the end, before long, for the first(second…)time, the minute等。
表转折关系的连接词：yet, and yet, but , while, on the contrary, on the other hand, however, at the same time(然而)等。
表解释说明的连接词：that is, that is to say, in other words, such as, for instance, and so on, etc. and the like等。
表递进关系的连接词：not only…but (also), what，s more, what's worse, besides, in addition, worse still, moreover, above all等。
表示总结的连接词：in a word, on the whole, in short, briefly, in brief, to sum up, in all等。
英文连接词是连接英文单词的词，如also，and等。英语有486,000个左右的单词，而连接词却只有70个左右，它们总是非常高频率的出现在各类文章、对话、电邮等英语实际沟通中。
英文连接词像胶水一样将相关联的句子连接起来，国际心理学家、语言学家、教育家Chris Lonsdale 龙飞虎又把它称之为“胶水词”。胶水词就像英语的骨架一样重要，学会了胶水词，同时拥有词组的累积，就可以轻松灵活的造出任何需要的长句。