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
