I believe that those mountains will be covered with trees in a few years' time.见下.为什么是in the few years' time（注意飘号） 而不是in the few year's time.a few 修饰可数，但时间（time)是不可数呀。
问题描述：
I believe that those mountains will be covered with trees in a few years' time.见下.
为什么是in the few years' time（注意飘号） 而不是in the few year's time.
a few 修饰可数，但时间（time)是不可数呀。
答
a few 修饰复数名词。year要加s。变成years
years的所有格只在后面加一撇就可以了
答
几年当然是a few years，复数形式。复数形式的名词所有格，直接在s后加'
答
some, a few, many, a lot of，数词...+ 量词s' + 名词。因为前面是表是复数的词，量词固然用复数。后面是名词，所以用所有格形式。如：five meters' trees
但是，some, a few, many, a lot of，数词...+ 量词s + 形容词。量词用复数同上，但是因为后面是形容词，所以不能出现所有格形式。如：five meters tall
答
years 复数，因为有few，加'表示的 一些年后的时间
答
time是不可数,但是 year是可数的,而且few修饰的是year,a few修饰可数名词复数,所以要加s
答
因为year是可数名词 前面接的是a few
所以是a few years 因为后面接的time 构成所属关系
所以是in a few years' time
希望对楼主有所帮助~~