备考托福考试，有两个基础中的基础——词汇和语法。词汇量的丰富程度，决定了你能否看得懂一篇文章，但有的时候，你会惊喜地发现：这段英文我每个词都认识，但解读出来和原文意思完全相反……如果你遇到了这种情况，很有可能是因为你不熟悉文章中的连接词，导致曲解了句子含义。
1先后关系
at this time; first; second; at last; next;previously;simultaneously;eventually;last but not least;to begin with;to start with;to end with;finally;since then;first of all;afterwards; following this; preceding this;prior to this
2因果关系
because;because of this;since;as;for;owing to;due to;for the reason that...;in view of;for such areas on; as a result of; therefore;consequently;as a result;thus; hence; so;so that...; in consequence; as a consequence;accordingly;inevitably;under these conditions
3转折关系
but;even so;however;though;even though;independent of;reckless of ;despite that;in spite of that;regardless of;while…yet…;unless...
4并列关系
and;also;too;as well as;either...，or...;both...and...;for one thing...，for another...; meanwhile;at the same time
5递进关系
furthermore;moreover;further;In this way;still; not only...but also...; not...but...;in addition (to);additionally, much more interesting;more specifically;next;besides; as far as... is concerned; moreover;in other words;on one hand...;on the other hand...;even; as a poplar saying goes...;in order to do it...; to make things better(worse);accordingly;

6比较关系(相同点)
similarly; in like manner, in comparison with;when compared with;compared with;when in fact...; like...; likewise; similarly important; apart from(doing)...; ... rather than...，by doing so ;both…and...; in the same way;not only...but (also)
7对照关系(不同点)
yet; still; for all of that; notwithstanding; rather; neither ... nor; although;though; but; however; something is just the other way around(另一种方式);yet;conversely; unlike; opposed to; as opposed to ; in contrast; by way of;on the contrary;different from this;nevertheless; contrary to; whereas; while
8举例关系
for example; for instance; in this case; namely; as you know;like; such as; a case in point is...; in particular;including...; put it simply;stated roughly;as an illustration;a good example would be...;to detail this, I would like to...; It is interesting to note that...;as proof;take the case of;take…as example;as for;as regards;according to;on this occasion.
9强调关系
in fact;especially;particularly;moreover;naturally; what is particular;not to mention...;believe it or not;undeniably;it is certain/sure that...;by definition;definitely; undoubtedly; without a doubt; in truth;in any event; without reservation;obviously;not only..
10条件关系
if;unless;lest;provided that(考虑到);if it is the case;in this sense;once...;if possible;if necessary;if so;if not all;if anything
11归纳总结
in other words;to put it in a nutshell; in sum; therefore;hence;in short;in brief;to sum up;in conclusion; in summary; to conclude;the conclusion can be drawn that...; in short
12方位关系
beyond; opposite to; adjacent to(毗邻的); at the same place; there; over; in the middle; around; in front of; in the distance; farther; here and there; above;below; at the right; between; on this side
13目的关系
with this object; for this purpose; in order that; in this way;since; so that; on that account;in case; with a view to; for the same reason.
14重申关系
in other words; that is to say; namely;to put it in another way;as I have said;again;once again.
15时间关系
at once; immediately; at length; in the meantime; meanwhile; at the same time;in the end; then; soon; not long after; later; at once; at last; finally; some time ago; at present; all of a sudden; from this time on; from time to time; since then; when; whenever; next point; a few minutes later; formerly; as; once;since; occasionally; in a moment; shortly;whereupon; previously.