Our school is only ____ walk from here.A.5-minute B.5 minutes'

问题描述:

Our school is only ____ walk from here.A.5-minute B.5 minutes'
1.为何选A的话要加a而选B不用,walk在这里做可数名词用.为何当5 minutes' walk作为一个整体时就不加a呢?
2.名词所有格前的动词单复数形式应看前面(如5 minutes‘)还是看后面(如walk)?
3.名词所有格前是否加不定冠词,应看那个部分?

Our school is only A 5-MINUTE walk from here.
==Our school is only 5 MINUTES' walk from here.
注意:
1 walk在这里做可数名词单数用.A 5-MINUTE 在功能上与5 MINUTES' 一样,都是做定语
2 注意比较:------(一份)5天的工作:
1 5 days' work (5 days' 已经是定语了,work ----工作是不可数名词,所以前面没有a)
2 5-day work (work是不可数名词,前面没有a)
3 5 days' job (5 days' 已经是定语了,所以前面没有a)
4 a 5-day job (job是可数名词单数,前面必须有a)