1、【表示转折的衔接词】表示转折的：but, however, neverthless, nonetheless, yet, although等。
3、【表示结果或者目的的衔接词】so, therefore, hence, thus, consequently, accordingly, so...that, in order that, (so) that, lest等。
5、【表示条件的衔接词】if, unless, supposing(that), provided/provid足毂忍珩ing(that), only if, in case (that), in the event(that), so/as long as, on condition that, assuming(that)等。
