ToaddareasonToaddanexpectedresultToaddanegativeequalideaToaddanalternativepossibilityToaddanoppositeideaButandyethavesimilarmeanings:Theybothsignalthatanoppositeideaiscom-
ing.Butispreferredwhenthetwoclausesaredirectopposites.Whenthesecond
clauseisanunexpectedorsurprisingcontinuationbecauseofinformationgivenin
thefirstclause,yetisprefened.(Butisacceptableforbothmeanings;yetforonly
onemeaning.)Compare:I wanttostudyart,butmyparentswantmetostudyengineering.(direct
opposite)
Iamverybadatmath,yetmyparentswantmetostudyengineering.(surprising
continuationafter"Iamverybadatmath")Doctorssaythatstressis anotherlongevityfactor,sotrytoavoidstressif youwishtolivea longerlife.Dietis onefactorinhowlongpeoplelive,butit is nottheonlyfactor.nor Theydonoteata lotofredmeat,nordotheyeatmanydairyproducts.
Note:Normeans"andnot."It joinstwonegativeindependentclauses.Noticethatquestionword
orderis usedafternor.Coordinator§(CoordinatingConjunction§)
166 Part 111 I SentenceStructure