UC知道since 3 years ago是时间点还是时间段
来源：百度知道 编辑：UC知道 时间：2024/06/22 02:59:18
为什么呢，麻烦讲清楚
时间点
since后必须接时间点，for接时间段
SINCE是“自从某一时间点开始到现在”since 1900 意为从1900年开始到现在
FOR 表示已有一段时间 for two years 已有两年了
时间段
这个指[自三年前以来] 就是三年前到现在
如果是3 years ago就是三年前..那就是时间点了..
时间点
since+时间点 的一个结构
He has worked in this factory since three years ago.
It ____(be)3 years since ____(become)a middle schoolstudent
It____ten years since his father died .A is Bwas Chad been Dwill be 为什么选a
A: Is your grandpa still smoking ?B: No,it's years since he smoked.这里为什么用since 呢？
lt_about two years since he_here
one and a half years (have/has) passed since we last meet
It was ten years ___we mrt again.A.since B.beforeC.whenD.as
i said that it was at least ten years since I-----a social dance.
It may be many years ______ we meet again. A.after B. before C. since.
It was 10 years ____ I came to work for her. A. since .B. that.
My mom is a 71-year-old widow who has lived alone since my father died 19 years ago