1)表层次: first,firstly, to begin with, further, in the first place second,secondly, to start with, still, furthermore third,thirdly, what is more, last, last but not least also, and then, next, besides and equally important too moreover besides in addtion finally 2)表转折； by contrast although though yet at the same time but despitethe fact that even so in contrast nevertheless even though for all that notwithstanding on the contarary however in spite of on the other hand otherwise instead still regardless 3)表因果； therfore consequently because of for the reason thus hence due to owing to so accordingly thanks to on this account since as on that account in this way for as a result as a consequence 4）表让步： still nevertheless concession granted naturally in spite of all the same of course despite even so after all 5)表递近： furthermore moreover likewise what is more besides also not only...but also... too in addtion 6)表举例： for example for instance for one thing that is to illustrate as an illustration a case in point 7)表解释： as a matter of fact frankly speaking in this case namely in other words 8)表总结： in summary in a word thus as has been said in brief in conclusion altogether in other words to conclude in fact finally in simpler terms indeed in short in particular that is in other words of course on the whole to put it differently namely in all therefore to summarize