Question

a seven-day holiday 和a seven days' holiday的区别

有没有a seven day's holiday 这种用法
还有in_____time里面用什么。。也是SEVEN 和DAY

Answer 1

a seven-day holiday 和 seven days' holiday 有相同意思，
seven-day 是形容词，seven days' 是短语作为形容词。
加还是不加 a 要看句子的意思， 例：
We took a seven days' holiday in the Mediterranean.
We went on seven days' holiday in the Mediterranean.
都对，第一句 a 修饰 holiday。