sixteen year old、sixteen-year-olds、sixteen-year-old有什么区别

sixteen year olds 还是sixteen year old? sixteen year old、sixteen-year-olds、sixteen-year-old有什么区别 sixteen -year -olds和sixteen -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 Sixteen-year-olds什么词性 sixteen years old 什么词性 I think ( ) should not be allowed to drive.A sixteen years old B sixteen-year-old C sixteen-year-olds I think ____should not drive anywhereA.sixteen-year-old B.sixteen-years-old C.sixteen-year-olds为什么 six-year-old与six-year-olds的区别 sixteen-year-olds,old为什么加了s six years old 和 six- year- old 和 six- year- olds的区别如题 初三英语变成形容词时要不要加s例1Sixteen-year-olds shouldn't be allowed to work at night.例2He is a six-year-old boy.到底什么时候要加啊? 16岁的男孩们 英语怎么说sixteen-year-olds boy和sixteen-year-old boys哪个对?还有sixteen-year-olds对么？ 单选I think___shouldnot be allowed to drive.A.sixteen-year-old B.sixteen-year-olds 选什么 Sixteen-year-olds should be allowed drive.sixteen-year-old 是形容词,不应该加S的, 单选I think___shouldnot be allowed to drive.A.sixteen-year-old B.sixteen-year-olds 为什么选B, sixteen-year-olds可以直接使用,sixteen-year-old不可以直接使用后面要加boy? _ should be allowed to do some sports after school in the afternoon.A.Sixteen-years-oldB.Sixteen-year-oldsC.Sixteen-year-old My little brother is ____.A.a six-years old boy B.a six-year-old boy C.a six-years-old boyD.a six-year old boy