a good night sleep,sleep不是一个不可数名词吗,这的a修饰的是什么,为什么?
问题描述：
a good night sleep,sleep不是一个不可数名词吗,这的a修饰的是什么,为什么?
答
语言习惯，意思是；睡个好觉
答
sleep n. 1 [U] condition that occurs regularly in humans and animals, esp. at night, in which the eyes are closed and the muscles, nervous system, etc are relaxed;睡眠
2 [sing] a period of sleep; 睡眠时间,3 [U] (infml) substance that gathers in the corners of the eyes during sleep;眼眵
如上所示，sleep作第二种解释时是单数名词，如 have a short, good, restful, etc sleep 短时间的、良好的、安静的...睡眠
答
a修饰的其实是night,整个a good night修饰sleep,前面修饰部分整个是一个短语,并不能单一看a.