3.表明作者的观点、态度  

1)Introducing( or emphasizing) further evidence:  

moreover, furthermore, in addition, what’s more, as well, etc.  

2)Cause:  

because (of), since, owing to, on account of, due to, as a result of, etc.   来源：www.examda.com

 

5)Comparison:  

in like manner, likewise, in the same way, similarly, in comparison with, etc.  

6)Purpose:   来源：www.examda.com

to this end, for this purpose, with this in mind, in order to, so that, etc.  

7)Intensification:   来源：www.examda.com

indeed, in fact, in any event / case, at no time, to tell the truth, etc.