这几种年龄的英语表述方法是否正确Mostofthemwereonlysixteen.Theyweremostlysixteen-year-olds.sixteen-year-old是形容词吧?为什么加sTheboythepolicearrestedwasonlynine!Hewasonlyanine-year-old.形容词?Theyareal

　　这几种年龄的英语表述方法是否正确

　　Mostofthemwereonlysixteen.

　　Theyweremostlysixteen-year-olds.sixteen-year-old是形容词吧?为什么加s

　　Theboythepolicearrestedwasonlynine!

　　Hewasonlyanine-year-old.形容词?

　　Theyareall10yearsold.

　　They'reallten-year-olds.跟第一例同问