句子之间的关系多种多样，常见的有：并列关系、因果关系、递进关系、转折关系和相互解释关系。
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Womencouldanddidplayapartinthisprocessofsettlement.Iceland,forinstance,wasuninhabited,andapermanentpopulationcouldonlybeestablishedifwomenalsomadethejourneythere.(后一句的具体事例为前一句提供说明与解释)
Peopleborrowedmoreandmoremoneysothattheycouldbuytheseshares.Becauseofthis,theAmericanpeoplestartedtobelievethatsharepricescouldonlygoupfurther.(“becauseof”明显的因果关系)
Astronomyisasciencethatdealswithallthecelestialbodiesintheuniverse.Astronomyincludesthestudyofplanetsandtheirsatellites,cometsandmeteors,starsandinterstellarmatter,starsystemsandclusters.(后一句是对前一句celestialbodies的进一步解释)
PreviouslyitwasbelievedthatduetotheArchaeopteryx’s(始祖鸟)underdevelopedanatomy,itwouldnothavebeenabletofly.However,researchbytheLondonNaturalHistoryMuseumintoitsbraindevelopedandthatithadgoodvisionandagoodsenseofbalance—alltherequirementsforacreaturetobeabletofly.(“However”转折对比)
阅读时，我们可以根据段落中出现的一些信号词(SignalWords)来判断句子与句子之间的关系，掌握段落发展线索，来调整阅读速度，提高阅读质量。
1.显示相同信息的信号词：
Therehasbeenanupsurgeofinterestinchambermusic.Likewiseoperaisreceivingaboostfromincreasedrecordsales.
“likewise”这一信号词显示了前面所提到的idea后面还要再一次出现。因此，阅读时见到这样的信号词无须放慢阅读速度。这样的信号词还包括：
and,furthermore,more,than,that,also,likewise,moreover,inaddition,whatismore,forinstance,forexample
2.显示思路转折的信号词：
I’dliketogobutI’mtoobusy.
“but”前后是完全不同的信息描述，它向读者显示了作者的思路在这里有了转折。阅读时，碰到这样的信号词我们需放慢阅读速度，以准确获取作者真正想要说明的意思。这类信号词还有：
although,however,onthecontrary,but,inspiteof,otherwise,despite,nevertheless,yet
3.显示因果关系的信号词：
Asaresultofthepilots’strike,allflightshavehadtobecancelled.
Allflightshavehadtobecancelledasaresultofthepilots’strike.
所有航班被取消的原因是因为飞行员们的罢工;飞行员们的罢工导致了所有的航班不得不被取消。显示因果关系的信号词还有：
for,thus,because,forthisreason,so,therefore,as,since,consequently
4.显示顺序的信号词：
Internetspeedscommunicationbetweencompanies,amongco-workersthroughvideo-conferences,andamongotherindividuals.First,mediacompaniesusetheInternetforonlinenews,ortobroadcastaudioandvideo,includingliveradioandtelevisionprograms,whileindividualsusetheInternetforcommunication,entertainment,findinginformation,buyingandsellinggoodsandservices.Second,thenotionofdistancedisappearsthankstotheInternet.Peoplealsoenjoyinstantmessagingtoexchangetextmessagesorpicturesinrealtime,withreal-timevideoandsound.Finally,scientistsandscholarsusetheInternettoperformresearch,distributelecturenotesorcoursematerialstostudents,theycommunicatewithcolleagues,andcanalsopublishpapersandarticles.
抓住了这样的信号词就把握住了作者叙述的顺序，也就分清了相对独立的论据。这样的信号词包括：
first,second,third,andsoon,then,after,before,next,last,afterward,finally
5.表示结论/总结的信号词：
Inconclusion,IwouldliketosayhowmuchIhaveenjoyedmyselftoday.