eight-year-old和eight-year-olds后一个加了s也对吗?

eight years old与eight- year-old eight years和eight-year-old和eight-years-old和eight year oldhe is an____boy?A.eight years B.eight-year-old C.eight-years-old D.eight year old选哪个,我刚刚查了一下,有个人说eight-year-old在名词前,eight years old在be动词后.还 是a eight-year-old 还是an eight-year-old __(a) eight-year-old eight-year-old和eight-year-olds后一个加了s也对吗? eight-year-old和eight years old做选择题时该怎么看 eight -year old 与 eight years old的区别 英语eight years oldeight years old eight-year-old eight-years-old eight-years old有什么不同 My son is eight year old.改错 Mary is girl,but she knows a lot about science.A.a eight-year-old B.eight-year-old C.eight years old D.an eight-year-old he is ____boy 1.a eight-year-old 2.an eight-year-old 3.an eight-years-old 4.a eight year old She is a ______ girl .A .eight years old B.eight year old C.eight-years-old D.eight-year-old an eight-year-old child与an eight years old child 的区别 Her sister is eight's old.划线提问,划线划在eight year's old Benny is an eight-year-old boy 相同的句子 It is an eight- year-old child改为同义句 an eight-year-old一定要加an吗? eight：