hundred后加year还是years

hundred后加year还是years one and a half 后加year 还是years 表示年龄的英文如果说年龄.是 two hundred years old 还是 two hundred year old 呢.为什么. three hundred years 与 three-hundred-year 的区别? about后加hundreds of还是three hundred(具体数字) two hundred 后要不要加s啊?是two hundred 还是two hundreds? They built the temple two_____agoA hundreds of years B hundred years C hundred-year D hundred year这个有两种 把两种说出来 然后year加不加S 为什么? year olds还是years old? Less than ( ) lived there two ( ) ago.A,hundreds of people,hundred years.B .hundreds of people ,hundreds year.选择哪个啊?为什么?（另hundred 不是不加S ） 一年半用英文数字表达是是1.5 year还是1.5 years?什么时候加s? two years and a half 还是two year and a halfyear后没有没有s啊? a hundred years One Hundred Years 歌词 less than( )lived there two( )ago.A.hundred of people,hundreds years B.hundreds of peoples,hundred years C.hundreds of people,hundred years D.hundreds of people,hundreds year 英语这样的复合词怎么用?4-year old还是4-year- old?4 years old还是4 years' old为什么 20 minutes' ride而不是20 minutes ride?什么时候要加'S或者'?横线究竟是一条还是两条? There are ( three hundred and sixty-five )days in a year.hundred后面不应该加s吗? 为什么two-year-old的year不加S而two-hundred-words的word要加S hundred后面可以加s吗例如：one hundred,那到底是“two hundred”,还是“two hundreds”呢?