mouse loudmouth our hour flour trousers mouth groung
/əʊ/发音规则:o oa ow
/aʊ/发音规则:ou ow
单词举例:house out ground sound loud mouse flower down now cow how
单词举例: bike fine find nine light night height neither my try fly eye
15 /eə/ 发音规则: ear air ere
单词举例:pear bear chairair fair there where care