连词,它们总是非常高频率的出现在各类文章、对话、信函、邮件等英语实际沟通中,我们经常在句子中用到的连词有,比如:if,,however,yet,although,while,and,then,because,but等等,
连词的英文全称是Conjunctions,它的英文缩写是(conj.),不同的连词在句子中表达不同的作用,每个连词本身都有各自的位置和用法:

1)表示承接的过渡词:also,and,and then,too,in addition,furthermore,moreover,what's more, again,on top of that,another,first,second,third等。
2)表示空间顺序的过渡词:near(to),far(from),in front of,behind,beside,beyond,above,below,to the right/left,around,outside等。
3)一方面,另一方面:on the one hand,on the other hand,for one thing,for another等。
4)表示结果和原因的过渡词:because,since,so,as a result,therefore,then,furthermore,thus,otherwise等。
5)表示解释说明的过渡词:for example,in fact,in this case,for actually, for instance等。
6) 转折关系:but;even so;however;though;even though;independent of;reckless of不顾 ;despite that; in spite of that; regardless of不顾; yet...;and yet; but unless. Nonetheless尽管如此
7) 强调关系:in fact; especially;particularly特别,尤其;moreover(此外);naturally; what is more important;in reality事实上; certainly; of course; indeed; in particular;not to mention...;believe it or not;undeniably(无可置疑); other thing being equal;it is certain/sure that...;to be strict; to be true;by definition; definitely明确地,肯定地; undoubtedly; without a doubt; in truth, in any event(不论怎样); without reservation(毫无保留地); obviously, not only.. but(also...), both... and...
8) 顺序关系:first; second; thirdly; next; then; at the outset(在开始时),following this; at this time; now; at this point; after; afterward后来; after this; subsequently后来; lastly最终; finally; consequently所以,因此; before this; previously; preceding this; simultaneously同时地; concurrently(同时发生的)
9) 对照(不同点):yet; still; for all of that; notwithstanding虽然,尽管; rather当然,的确,宁愿,相当; neither ... nor; although; though; but; however; something is just the other way around;yet; conversely相反的; unlike; opposed to; as opposed to this与不同 ; in contrast (to); by way of;on the contrary;different from this; nevertheless然而,不过,虽然如此; contrary to; whereas但是,鉴于; while;but on the other hand
10) 举例关系:for example; for instance例如; in this case既然假若这样; namely也就是 instance例子实例
换句话说; as you know; you may as/say; as he explains; like; such as; a case in point is一个恰当的例子是...; consider...; in particular尤其特别;including...;for one thing...首先,for another...;put it simply;stated roughly粗糙地,概略地; as an illustration, I will say...; a good example (of...)would be...;to detail this,I would like to...; It is interesting to note that...;in this situation; as proof; take the case of; take as example (something); as for; as regards; as to; according to; on this occasion.