你的第一个问题两者都可以,数词-名词-形容词这个结构可以构成形容词所以上面的4-metre-deep都可以这样用!例如：she is 10 years old 与 she is 10-year-old 意思是一样的!
而你第二个问题就不能这么用了,因为three-bed是形容词用来修饰room这个名词的,而three beds则不能代替three-bed.
The river is 4 metres deep 为什么不能说 The river is 4-metre-deep?
3个回答
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