years和year有什么区别

years和year有什么区别 three-year-old 和 three years old 有什么区别 three -year-old 和 three years old有什么区别? 11-year-old和11 years old有什么区别 four-year 和four years有什么区别? 16-year-old和16-year-olds和16 years old有什么区别? year by year和year after year有什么区别? fifteen-year-old 和fifteen years old 有什么区别?包括他们各自的用法 five-year=old和five years old用法有什么区别啊 six-year-old和six years old用法有什么区别? 请问：in a few years' time和in a few year's time有什么区别 请问：in a few years' time和in a few year's有什么区别 six-year-old boy和six years old boy 有什么区别?一样么?为什么? 在英语中表示岁数的year和years old有什么区别? 请问year's time 和 year's time 有什么区别?这一类词怎么区分?打错了，是 years' time 和 year's time twelve years old twelve year old twelve—years—old twelve—year—old 有什么区别twelve years oldtwelve year oldtwelve—years—oldtwelve—year—old有什么区别 sixteen-years-old与sixteen years old有什么区别sixteen year olds与sixteen-year-old都是什么时候用 years'和year' s的区别