在雅思写作的评分标准中，有很重要的一项叫做连贯与衔接 (Coherence and Cohesion)。连贯性指文章的流畅程度，文章的观点应该逻辑清楚，易于理解和把握。
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 a reason; 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.