(for )two weeks 是时间段 区别：时间点(since )two weeks ago 再问： 时间点 和 时间段的 区别 说简单点 再答： 时间段就是指‘ 一段时间’ 时间点就是指‘ 某个时间点’ 如 He has been dead for a year. He has been dead since a year ago,. He has been here since last night . He has finished it for a week . He has finished it since a week ago . 认真比较一下以上的时间状语你就明白了。
