w.b.yeatsisgenerallyconsideredtobeoneofthetwentiethcenturyskeyenglish-languagepoets.hecanbeconsideredasymbolistpoetinthatheusedallusiveimageryandsymbolicstructuresthroughouthiscareer.yeatschooseswordsandputsthemtogethersothatinadditiontoaparticularmeaningtheysuggestothermeaningsthatseemmoresignificant.hisuseofsymbolsisusuallysomethingphysicalwhichisusedbothtobeitselfandtosuggestother,perhapsimmaterial,timelessqualities.yet,unlikemostmodernistswhoexperimentedwithfreeverse,yeatswasalsoamasterofthetraditionalverseforms.theimpactofmodernismonhisworkcanbeseenintheincreasingabandonmentofthemoreconventionallypoeticdictionofhisearlyworkinfavorofthemoreausterelanguageandmoredirectapproachtohisthemesthatincreasinglycharacterisesthepoetryandplaysofhismiddleperiod,comprisingthevolumesinthesevenwoods,responsibilitiesandthegreenhelmet.hislaterpoetryandplaysarewritteninamorepersonalvein,andtheworkswritteninthelasttwentyyearsofhislifeincludementionofhissonanddaughter,aswellasmeditationsontheexperienceofgrowingold.inhispoem,thecircusanimalsdesertion,hedescribestheinspirationfortheselateworks:nowthatmyladdersgoneimustliedownwherealltheladdersstartinthefoulragandboneshopoftheheart