常用的关联词分为十一大类：

　　1.Additionin

　　addition，and，similarly，likewise，as well as，besides，furthermore，also，moreover，and then，too，not only ... but，even，besides this/that

　　2.Sequence

　　first(ly)，initially，second(ly) etc.，to begin with，then，next，arlier/later，after this/thatfollowing this/that，afterwardsc

　　3. Consequence

　　as a result，thus，so，therefore，constantly，it follows that，thereby，eventually，then，in that case，admittedly

　　4. Contrast

　　however，on the other hand，despite，in spite of，though，although，but，on the contraryotherwise，yet，instead of，rather，whereas，nonetheless，even though，compared with，in contrast，alternatively

　　5. Certainty

　　obviously，certainly，plainly，of course，undoubtedly

　　6. Condition

　　if，unless，whether，provided that，for，so that，whether，depending on

　　7. Definition

　　is，refers to，means，that is，consists of

　　8. Summary

　　in conclusion，in summary，lastly，finally，to sum up，to conclude，to recapitulate　in short

　　9. Example

　　for instance，one example，for example，just as，in particular，such as，namel to illustrate

　　10. Reason

　　since，as，so，because(of)，due to，owing to，the reason why，in other wordsleads to，

　　11. Time

　　before，since，as，until，meanwhile，at the moment，when，whenever，as soon as，just as