years'和year' s的区别

years'和year' s的区别 year和years的发音区别 20 years’ 20year’s 20-years’ 20-years 的区别? years old 和year-old的区别和用法 every two years 和every other year的区别? ten years old 和ten-year-old的区别 16-years-old和16-year-olds的区别 seven years old和even-year-old的区别 12 -year-old 和12 years old的区别 year old,year-old,years old,years-old的区别 fourteen year old和fourteen years old和fourteen-year-old和fourteen-years-old的区别 six years old 和 six- year- old 和 six- year- olds的区别如题 years和year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 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 year-old与years old的区别 ten-year-old ten years old’s的区别,具体怎么用,