c、p、t在s之后不送气，即部分失去爆破，或叫做不完全爆破。下面一篇文章讲述的就是这种不完全爆破音。
TodayI'mgoingtomakeitalittlemorecomplicatedandtalkaboutwhathappenswhentheunvoicedstops(that'sthetsound,psoundandksound),aren'tthefirstsoundofawordorastressedsyllable,namelywhenthesesoundsoccurafterthessound.Iknow,itseemslikethedetailsofthesesoundsneverend!
Let'sexplore.IntheEnglishspellingsystem,wordsthatbeginwiththeletterscanbefollowedbytheunvoicedstops.Thosearetheletterp(asinthewordspell),t(asinthewordstar),andk(asinthewordsky),orc(asinthewordscare).Wordsthatbeginwiththeletterscannotbefollowedbyvoicedstops.Thosearethelettersb,d,org.Thatspellingcombinationjustdoesn'texistinEnglish.
I'velearnedfromtheforumsthatsomestudentsaretaughttopronounceunvoicedstopsasvoicedstopsafteranssound.So,thecombinationsp-ispronouncedassb-.Withthisidea,studentsaretaughttothinkaboutthepronunciationofthewords-p-a-r-kass-b-a-r-k.
That'swhywebeganthisshowwiththelisteningexperiment.TheaudiofilesIhadyoulistentoatthebeginningofthisshowwerealteredfiles.TheaudioIplayedforyouwasnotfromeitheroftheoptionsIspelled.Instead,Itookthewordsspark,span,style,scold,andscum,anddigitallyremovedthessoundfromthebeginningofeachword.Ididn'tchangetheaudioinanyotherway.Youheardtheremainderoftheword.Inallhonesty,IwasverysurprisedhowmucheveryexampleIcouldfindrepeatedthetheory:afteranssound,unvoicedstopsarepronouncedvery,verysimilarlytotheirvoicedcounterparts.
Sincethereisnochanceofaccidentallysayingadifferentwordwiththisoption,there'snoharminthinkingaboutitthisway.Remember,therearenowordsinEnglishthatbeginwiththesb-,sg-,orsdspelling.
So,inourlisteningexperiment,ifyouheardthewordfromthepairthatbeganwiththevoicedstopsound,youmightbenefitfromthinkingofsp-,st-,sk-,andsc-asactuallybeingpronouncedassb-,sd-,andsg-.
希望我能帮助你解疑释惑。
