Nasals,ApproximantsLateral(s)Likethestops,thenasalsareallmadebyclosingthevocaltractatsomepointinthemouth.Unlikethestopsoranyothersoundsinthelanguage,thereisanopeningintothenasalcavityinthepronunciationsothatthesoundcanberesonatedthroughthenose.Thenasalconsonantsare/m/,/n/,and/?/./w/,/r/,and/j/arecalledapproximantsbecauseitisanarticulationinwhichthearticulatorsapproacheachotherbutdonotgetsufficientlyclosetoeachothertoproduceacompleteconsonantsuchasastop,nasalorfricative./l/iscalledalateralbecauseduringitspronunciation,thepassageofairthroughthemouthdoesnotgointheusualwayalongthecentreofthetongue.
UNIT9/?//?//?/汉英对比：/?/浊辅音.发音时,双唇闭拢,气流从鼻腔泻出,声带振动./?/的发音近似于汉语的“母”,但区别之处在于发/m/时要双唇紧闭,声带振动./?/浊辅音.发音时,舌尖贴上齿龈,形成阻碍,气流从鼻腔泻出,声带振动./n/的发音接近于汉语的“恩”,但不同之处在于发/?/时，嘴唇微开,舌尖贴紧上齿龈./?/浊辅音.舌后部抬起紧贴软腭,形成阻碍,同时软腭下垂,堵住口腔通道,气流从鼻腔泻出,声带振动./?/的发音近似于汉语“嗯”,但不同之处在于：发/?/时口腔开得更大,声带振动./?//?/
/?//?/
/?/单词发音练习moonhomemedicinemountain
/?/短语man-madecometomorrowmakeamistakemiddlename
/?/句子A:Mumhascomebackhome.B:Marvellous.A:Mumsayswe’llgoandseeamovietonight.B：Yes,wecertainlywill.
Allophonicvariationsof/m/Syllabic:somethingLengthened,whenanarresting/m/isfollowedbyareleasing/m/: somemoreThelabiodnetalnasal,whenfollowedby/f/:comfort
/?/单词发音练习necktinnightnoise
/?/短语neatbrandytelephonenumberanegativeanswerhardentheneck
/?/句子A:WhatanicepostcardoftheGrandCanyon!B:TheyarewonderfulA:WhosentittoyouB：Afriendofmine.
Allophonicvariationsof/n/Dentalizedbeforealabiodental/f/or/v/:inviteVelarizedbefore/k/or/?/:thinkSyllabic:buttonLengthening,when/n/arrestsandreleasesadjoiningsyllables:tennames
/?/单词发音练习inkringsingmonkey
/?/短语ri