Ben is a ______boy 是twelve-year-oid,为什么不是twelve-years-oid,详细解释

题目

Ben is a ______boy 是twelve-year-oid,为什么不是twelve-years-oid,详细解释
还有The oid man doesnot ____him.是listen to不是hear of,详细解释
还有：what job does Peter like to___是do不是be,详细解释
这两题老师将的我云里雾里所以要解释好点O

答案

twelve-year-oid
用横杠将数词与名词分开是不需要加s的
而且 修饰的是名词,
如果twelve-year-old放句末,那么将变成twelve-year-oid
例：She is a five-year-old girl=The girl is five years old
简单一点就是 “-”="s”
listen to意为“听”是修饰人的 hear of意为“听说过”,修饰事情
like to do sth 没有 like to be sth这个句型
加油哦,相信你一定能学好英语的