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