sisteen-year-olds的后面为什么要加s
They were children.Four and five-year-olds,为什么old加s
shouldn`t sisteen-year-olds be allowed to work at night? 16岁
sixteen-year-olds可以直接使用,sixteen-year-old不可以直接使用后面要加boy?
英语为什么名字后面的单词要加S,第三人称后面要加S,名字也要吗?
hobie s后面为什么要加s?
为什么two-year-old的year不加S而two-hundred-words的word要加S
He' only forty-one years old.要了forty one中间的——为什么还要在year后面加s
为什么merry chrismas后面要加happy new year?
英语最喜欢的动物后面为什么要加s?
为什么family后面的动词要加-s
为什么要给These后面的单词加s
第三人称 后面的动词为什么加S