问
（1）The students are going to take the test in two days' time. (New Concept English, Book 2, L.84) (2) The Olympic Games will be held in our country in four years' time. (同上, L. 37) in two days' time 和 in four years' time 与 in two days 和 in four years 有无区别?
答
在表示从现在算起的一段时间的末尾这一意义时, in two days' time 与 in two days 是同义的, 均表示“两天后”。但是, 当表示做某事所经历的时间长度时, 则只能使用 in two days 这种格式:
1541 It's (high/about) time he found...
The bird covered the distance in three minutes. (NCE 2, L. 5). 这只鸽子三分钟便飞完了全程。 [参见 in(in three minutes)]