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