He has made much progress in his field in the past twenty years.能换成since the past 20 years么
问题描述：
He has made much progress in his field in the past twenty years.能换成since the past 20 years么
答
不可以 这句花翻译成 在过去20年里他在他工作的领域取得很大成绩 since 后加点时间状语 FOR 后加表示一段的时间状语