元音的分类

Fourcriterias:•Theheightoftongueraising•Thepositionofthehighestpartofthetongue•Thelengthortensenessofthevowels•Lip-roundingTheheightoftongueraising（high,mid,low)Thepositionofthehighestpartofthetongue(front,central,back)•Afriendinneedisafriendindeed.•Afatcatiscatchingafatrat.•Thenurseputherpearlsinherpurse.•Agoodcookstoodinawoodtohavealookatagoodbook.Thelength/tensenessofthevowel(long/tense,short/lax)•Longvowels:{i:}{ɜː}{a:}{ɔ:}{u:}•Shortvowels:{e}{i}{u}{ʌ}{ɔ}{ə}{æ}Lip-rounding(rounded,unrounded)•Roundedvowel:{u}{u:}{ɔ}{ɔ:}•Unroundedvowel:{i:}{ə:}{a:}{e}{i}{ʌ}{ə}{æ}•[ɔ]Theclockhasstopped.•[ɔ:]Pridegoesbeforeafall.•[u:]Chooseeitherbootsorshoes.•[u]Helookslikeagoodcook.•Monophthongs单元音•Diphthongs双元音iəeəuə……•Triphthongs三元音{eiə}（player）……•Nopainsnogains.•Asyousowyoushallmow.•Strikewhiletheironishot.•Roundandroundthehousewentthecrowd.•Thespoiltboydestroyedthetoys.•Sheisreallydearerthanadear.•There,that’sthesquarewherethefairwillbeheld.•Thejuryweresurethepoormanwasinnocentofstealingthejewels.