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

　　Certainty　确定

　　obviously， certainly，plainly，of　course，undoubtedly

　　Condition　条件

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

　　Time　时间

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

　　Addition　此外

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

　　Sequence　顺序

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

　　Consequence　结果

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