70—floor building 与 70 floors building 有什么区别啊？

来源：学生作业帮编辑：作业帮分类：英语作业时间：2024/07/13 23:44:47

70—floor building 与 70 floors building 有什么区别啊？
比如为什么只能用This is a 70—floor building 而不能用This is a 70 floors building

数词-名词,或者数词-名词-形容词,叫做复合形容词,去修饰另外的名词
中间用连字符,且该结构中名词只能用单数
如果把This is a 70 floors building改为This is a 70 floors' building.该句就正确了.
也就是说This is a 70—floor building.=This is a 70 floors' building.这是一栋70层的大厦.

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