"year"这个词说三岁是“three years old”如果用year表示“三个月”应该怎么写?

year这个词说三岁是“three years old”如果用year表示“三个月”应该怎么写? after three year 还是 three year later for year for year three at three这个词是什么意思 three five year periods Three year pain 还有esven year itch three-year-olds汉语意思 three-year's句式对吗? three year 用什么提问 three-year与three-years的区别是什么? three-year-old 和 three years old 有什么区别 three years old 与 three-year-old 的区别 three -year-old 和 three years old有什么区别? three-year-old 与 three years old区别 three hundred years 与 three-hundred-year 的区别? three years and half a year for three year前用什么时态 there three year 用于什么时态