表示时间关系：first,second,then,finally/at last／in the end ,soon immediately,suddenly,at the same time,meanwhile,recently
表示对称顺序关系：for one thing…..for the other thing,on one hand,…..on the other hand,above all,first of all,firstly,secondly,next,finally,the former….the latter,
表示递进关系：what is more,as well,moreover,besides ,furthermore,in addition,what’s worse
表示换一种方式表达：in other words ,that is to say,
表示举例说明：for example,like,such as,for instance
表示陈述事实：in fact ,actually,as a matter of fact,to tell you the truth
表示总结：on the whole,in a word,to sum up,in short,in conclusion,from what I have said above
表示因果关系：as a result ,thus,therefore,so that,as,because,consequently,
表示转折：but,however,while,instead,although,different from,not only ..but also
表达自己的观点：in my opinion,personally,as far as I know,I believe,I think,as we all know ,It is known to us all that….