1) 先后次序关系：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；seeing...；since then；first of all；afterwards;
following this; preceding this.
2) 因果关系：because；because of this；being that；another important
factor／reason of...； since； as； for； in that...； owing to； due to； for
the reason that...； in view of； the reason seems to be obvious; there are
about...；for this reason; as a result of this； therefore；...and so...；
consequently；as a result； thus； hence； so；so that...； in consequence； as a
consequence； accordingly; inevitably; under these conditions; thereupon.
3) 转折关系：but；even so；however；though；even though；independent of；reckless of
；despite that； in spite of that； regardless of; yet...；and yet； but
unless.
4) 并列关系：and; also；too；as well as；either...,or...；both...and...
5) (补充)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；along this line of consideration；on the one
hand...,on the other hand...； even； as a poplar saying goes...；in order to
do it...; meanwhile； at the same time； accordingly； In the first
place...,in the second place...;equally important; of even greater appeal.
6) 比较关系：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(不同点)：yet; still; for all of that; notwithstanding; rather; neither
...nor; although; though; but; however; something is just the other way
around；yet; conversely； unlike； opposed to; as opposed to ； in contrast
(to)； by way of；on the contrary；different from this；as opposed to this；
