让步
　　although, after all, in spite of…, despite, even if, even though, though, admittedly, whatever may happen.

　　转折
　　however, rather than, instead of, but, yet, on theother hand, unfortunately. whereas.

　　原因
　　for this reason, due to, thanks to, because, because of, as, since, owing to.

　　结果
　　as a result, thus, hence, so, therefore, accordingly, consequently, as consequence.

　　总结
　　on the whole, in conclusion, in a word, to sum up, in brief, in summary, to conclude, to summarize, in short.

　　其他
　　Mostly, occasionally, currently, naturally, mainly, exactly, evidently, frankly, commonly, for this purpose, to a large extent, for most of us, in many cases, in this case.