常用的关联词分为十大类：

　　一.　Addition　此外

　　in　addition, and，similarly， as　well　as，besides，furthermore，also，moreover，too, not　only　...　but，even，besides　this／that　

　　二.　Sequence　顺序

　　first, initially，second　etc.，to　be?gin　with，then，next，earlier／later，following　this／that，afterwards

　　三.　Consequence　结果

　　as　a　result, thus，so，therefore，consequently，it　follows　that，thereby，eventually，to　that　case，admittedly

　　四.　Contrast对比

　　however, on　the　other　hand，

　　despite，in　spite　of，though，although，but，on　the　contrary

　　otherwise, yet，instead　of，rather，whereas，　nonetheless compared　with，in　contrast

　　五.　Certainty　确定

　　obviously, certainly，plainly，of　course，undoubtedly

　　六.　Condition　条件

　　if, unless，whether，provided　that，for，so　that，whether，depending　on

　　七.　Time　时间

　　before, since，as，until，meanwhile，at　the　moment，when，whenever，as　soon　as，just　as

　　八.　Summary　总结

　　in　conclusion, in　summary，lastly，finally，to　sum　up，to　conclude，to　re?capitulate,in　short

　　九.　Example举例

　　for　example，for　instance，just　as，in　particular，such　as，namely

　　十.　Reason原因

　　since，as, so, because (of)，due　to，owing　to，the　reason　why，in　other　words,　leads　to，cause