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问题描述
No way! I don't think _______ should be allowed to drive.
A. fifteen years old
B. fifteen-year-olds
C. fifteen-year-old
这道题选 B，对吗？这样可以表达一类人吗？
求老师给出解答？谢谢！
老师答疑
陈老师：
▲15-year-old这类词有两个用法：
一是用作形容词，用于名词前作定语。如：
The 46-year-old author has finally hit the big time. 这位 46 岁的作家终于走红了。
Six-year-old Gemma had been left alone in the house. 六岁的杰玛被单独留在了房子里。
It’s not very dignified behaviour for a 54-year-old man. 对于一个54岁的人来说，这种行为太有失体面了。
The court heard how the mother had beaten the 11-year-old boy. 法庭听取了这个母亲如何暴打那个11岁男孩的经过。
二是直接作用名词，表示多大岁数的人（为可数名词，与其他普通名词一样，可以连用不定冠词或用复数）。如：
The test was administered to all 11-year-olds. 这项测试的实施对象为所有 11 岁的孩子。
He was not considered competent to teach seven-year-olds. 他被认为没有能力教7岁的孩子。
Her command of language is very advanced for a six-year-old. 对于一个6 岁的孩子来说，她对语言的掌握已是很超前了。
Even a six-year-old can have an accident at night sometimes. 即使是六岁大的孩子，晚上有时也可能会尿床。
▲现在回到你的问题来：你的句子中的 fifteen-year-olds 就是 fifteen-year-old 用作名词时的复数形式；泛指15岁的孩子，应该用复数形式。当然，若选项 C 加上不定冠词也是对的，即：
No way! I don't think a fifteen-year-old should be allowed to drive.（正确）
陈老师：
No way! I don't think _______ should be allowed to drive.
A. fifteen years old
B. fifteen-year-olds
C. fifteen-year-old
这道题选 B，对吗？这样可以表达一类人吗？
求老师给出解答？谢谢！
为你回答如下：
(1) 数词-year-old 可以当作复合形容词 意思“多少岁大的”+名词 ;放在名词前作前置定语
(2) 当作名词使用，表示泛指多少岁大的人，可以加复数和冠词
题目属于第2种用法:
No way! I don’t think fifteen-year-olds should be allowed to drive.
不可以！我认为15岁大的人不应该被允许开车。
黎老师：
No way ! I don't think __________ should be allowed to drive .
A. fifteen years old
B. fifteen-year-olds
C. fifteen-year-old
这道题选 B.对吗？这样可以表达一类人吗？
【答】这道题选 B 是正确的。fifteen-year-olds的意思是“15岁的孩子”。例如：
Sixteen-year-olds should be allowed to get their ears pierced. 应该允许16岁的孩子穿耳洞。（摘自教育部审定2013义务教育教科书《英语》九年级全一册, Go for it! p.122, 人民教育出版社2014年3月第1版）
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