maria won the first prize in ______ singing competition A .this week B.last week’s C.next week's我选的是B 可老师打的是叉 可我又觉得是对的 是不是老师改错的?还有一个问题 ：14 years old 和 14-year-old 的区别和用

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maria won the first prize in ______ singing competition A .this week B.last week’s C.next week's我选的是B 可老师打的是叉 可我又觉得是对的 是不是老师改错的?还有一个问题 ：14 years old 和 14-year-old 的区别和用
maria won the first prize in ______ singing competition A .this week B.last week’s C.next week's
我选的是B 可老师打的是叉 可我又觉得是对的 是不是老师改错的?
还有一个问题 ：
14 years old 和 14-year-old 的区别和用法
分数不算很多 等级太低 一点敬意
还有作文用自我表达的时候是用 14-year-old还是 14 years old

maria won the first prize in ______ singing competition A .this week B.last week’s C.next week's我选的是B 可老师打的是叉 可我又觉得是对的 是不是老师改错的?还有一个问题 ：14 years old 和 14-year-old 的区别和用
这个.感觉没有正确答案的.= =! 首先排除C,因为 won 过去时,
原意是指 “上周的歌唱比赛”,但是名词所有格的用法是有限制的,一般表示有生命的东西的名词及某些表示时间、距离、星球、世界、国家等无生命的东西的名词后加 ’s来表示所有关系,
原题的话,其实不适合用名词所有格,虽然名词所有格有针对时间的用法,但一般是指例如说：two weeks' tour 两周的旅程； 是表示一段时间内做的什么,而不是一个时间点做了什么,原题中 last week 的比赛说的是时间点； 通常这样的话我们都不会用名词所有格而是介词of, 原句可以改为：maria won the first prize of singing competition of last week, 借助介词of 来表示从属关系. 不过感觉A答案就更不靠谱了.所以的话 B 是这里面的最佳答案,但个人觉得不是正确答案；
14 years old 用法 ： he is 14 years old 他14岁
14-year-old 用法： he is a 14-year-old boy 他是个14岁的男孩
在作文中直接用 I am 14 years old 就好了,或者说 I am 14-year-old boy 后者听上去句子高级点哈
简单来说,14 years old 名词性质；14-year-old 是个形容词性的结构,这种结构还是满常见的,你只要把那几个名词结合起来,14 years old “14岁”,加上横线就变成“14岁的”.再举个例子, 14 miles far 14里；14-mile-far “14里远的“； 注意的就是中间的复数名词要去掉s,单数就好
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