单元音长音长，短音短，不要变音

单元音
注意嘴型；其后常跟卷舌音，先发前音再发卷舌音

hot shop
hospital watch
car march
card farmer

单元音
注意嘴型，介于“啊”和“饿”之间；在美音中偏向“饿”

up bus
supper but
gun done
some love

单元音
长音；圆唇

food room
shoe do
tool rule
tooth mood

单元音
短音；注意嘴型，像“饿”
look good
would should
foot full
put wolf