①表示举例

a case in point， after all， as an proof， as an illustration， as an example， for example， for instance， in particular， just as， namely， specifically， to illustrate， to demonstrate

②表示增补

additionally， along with， also， as well as， besides， equally， even， furthermore， in addition， just as， moreover， not only…but also…， what’s more

③表示强调

above all， as a matter of fact， indeed， in fact， most important， obviously， to be sure， truly， undoubtedly， without doubt

④表示比较

by comparison， equally， equally important， in comparison， in the same way， in the same manner， likewise， similarly

⑤表示让步

admittedly， after all， all the same， although， even so， in spite of， nevertheless

⑥表示结果

accordingly， as a result， consequently， for this reason， hence， in this way， so， therefore， thus.

⑦表示转折

although， but， despite， except for， though， however， in spite of， instead， nevertheless， on the other hand， otherwise， rather than， though， yet.

⑧表示结论

as has been noted(mentioned， stated)， at last， finally， in a word， all in all， in brief， in conclusion， in short， in sum， in summary， to conclude， to sum up ， to summarize.