托福閱讀中的邏輯關系詞作者在闡述觀點時會大量使用邏輯關系詞來組織結構，展開論證。在閱讀過程中，充分利用邏輯關系詞（也稱之為語言信號詞）是定位主旨和查找細節信息的重要閱讀應試技巧之一。通過尋找信號詞可以尋找線索，快速定位答案所在。常見的信號詞包括以下四類：-Comparison比較關系詞E.g.Thisapproachisconsideredtobemuchmoreeffectivethanthepreviousone.Mobiletelephonesaremuchthinnerthantheyusedtobe.Australiaisadrycontinent,secondonlytoAntarctica.Ofthevariousstrainsofthiscrop,thisnewhybridproducesbyfarthehighestyields.Mostpeoplestudyingintelligenceandcreativityinthenewmillenniumnowpreferabroaderdefinition.Signalwords:a.同級比較Equally;inthesameway;likewise,similarlyb.比較級：morethan,-erthan,lessthanc.變化：change)alter,vary,modify)revise)increase)decrease)enhance)diminish)develop)progress)advance)improve)retreat)degenerate)continue)remaind.差異：different,distinguish,separate,same,similar,comparable,compareto超越：surpass,exceed,excel,over,superiorto最高級1)本身有最高級含義：maximum,minimum,peak,outstanding,top2)本身程度比較深：amazing,surprising,astonishing,prohibitivelyhigh,deeply3)否定+比較=最高級Nooneismoreoutstandingthanhim.g.表示對比：while,whereas,incomparisonContrast轉折關系詞（讓步）轉折詞+重點內容，讓步詞+背景之類的（次重點）E.g.Inrecenttimes,however,thatloftyidealhasnotalwaysbeenattained.Ratherthan=rather=insteadof=nottakeresponsibilityfortheirweight,obesepeoplehaveoftensoughtsolaceintheexcusethattheyhaveaslowmetabolism.Nuclearpowersupplies5%oftheworld'senergyfrommorethan400Butplants.withtheexceptionofFranceandJapan,therichworldhasstoppedorderingnewreactors.Althoughthenumberoflibrariesmultiplied,libraryusersremainedfewinnumberthuntilliteracybecamemorewidespreadduringthe18century.Whilethereisnowbroadagreementabouttheeffectsofhigh-levelradiation,thereiscontroversyoverthelong-termeffectoflow-leveldoses.Signalwords:Conversely,admittedly,ironically,however,while,but,although,bycontrast,despite,eventhough,incontrast,inspiteof,insteadof,instead,nevertheless,nonetheless,ontheotherhand,onthecontrary,otherwise,though,rather,yet,whereasCauseandeffect因果關系詞因：because、becauseof、for、as、by、since、inthat、onaccountof、with果：so、sothat、therefore、thereby、asaresult、hence、thus、consequently、Accordingly,??因果關系除了傳統意義上的顯性因果表達詞外，隱性的因果同樣是不可忽略的一個重要部分。隱性因果：A導致（因-果）：cause、reason、leadto、giveriseto、resultin、render、make、let、ask、push、stimulate、fuel、produce、tempt、encourage、draw、trigger如：Theincreasedpressuresofexpandingpopulationhaveledtotheremovalofwoodyplantssothatmanycitiesandtowaresurroundedbylargeareascompletelylackingintrees.在這段話中，有leadto表示了導致的意思，即結果，而sothat更進一步表示了后面的結果，所以可以充分判定這段話有因果關系的邏輯。B由？而來（果-因）：resultfrom、derivefrom、originatefrom、initiatefrom、stemfrom、beattributableto、attributeto如：Theextremeseriousofdesertificationresultsfromthevastareasoflandandtremendousnumbersofpeopleaffected,aswellasfromthegreatdifficultyofreversingorevenslowingtheprocess.”在這段話中，根據resultfrom可以推斷出有因果關系，那如果是解釋句子題時，選項中有因果關系就可以優先考慮。C反映，體現（果-因）：reflect、show、present、demonstrate、suggest、implyD考慮到J:given、considering、inviewof、thanksto、accordingtoHesucceededthanksto（inviewof）hiseffort.E依賴于：relyon、dependon、resorttoHeresortedtobookswhenhehadproblems.F條件關系：when、once、assoonas、AslongasAssoonashegotthemoney,hewouldleavethecountryatonce.G分詞短語，不定式做狀語：Failinginthefinalexam,shecried.Negativity否定關系詞顯性否定：no、not、never、nor、none、neither隱形否定：failto、refuse、remove、reject、lackof、deprive否定前綴：a-、ab-、dis-、il-、im-、in