1) 进一步论证观点(Introducing further evidence): moreover, furthermore, in addition, what’s more, as well, etc.
2) 引入原因(Cause): because (of), since, owing to, on account of, due to, as a result of, etc.
3) 表示结果(Effect): as a result, hence, therefore, consequently, thus, so, etc.
4) 表示转折(Contrasting): in / by contrast, on the contrary, on the other hand, nevertheless, whereas, while, yet, however, but, etc.
5) 表示对比(Comparison): in like manner, likewise, in the same way, similarly, in comparison with, etc.
6) 表示目的(Purpose): to this end, for this purpose, with this in mind, in order to, so that, etc.
7) 二次解释(Intensification): indeed, in fact, in any event / case, at no time, to tell the truth, etc