（1）Did you ask for a ____ leave?
C. two days' D. two-days' (《海淀名题·初中英语语法完全解题》, 东北师大出版社, p.27)
(2) Did you ask for ____ leave? A. two days' B. two-day C. two days D. two-day's (《海淀名题·高中英语语法完全解题》, 东北师大出版社, p.26) 请问 a two days' leave 与 two days' leave 哪个是正确的?
几乎所有的词典都注明,作“休假”解的 leave 是个不可数名词。我们查到大量的例句来证明这一点:
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She's (gone) on leave. (CIDE) 她在度假(她去度假了)。
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He is on sick leave. (CEED) 他在休病假。
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Joe was home on leave. (NODE) 乔休假回家了。
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I have 25 days' leave each year. (OELD) 我每年有 25 天假。
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They were given six weeks' leave. (ELD) 给了他们六周假。
但是,我们也有证据证明 leave 可以用作可数名词:
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He requested a leave without pay. (NODE) 他请求一次不带薪的假。
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a leave of absence of ten days （葛传槨《英语惯用法词典》）一次十天的休假
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Write your English teacher a note asking for a sick leave. 给你的英语老师写一个病假条。
因此，我们有理由，把 a two days' leave 和 two days' leave 都看作是正确的。
leave(n.) leave/vacation/holiday 见 holiday