为备考的同学们整理了“2022年12月英语六级语法用法辨析之since的四种用法”，大家一起学起来!
2022年12月英语六级语法用法辨析之since的四种用法
1) since +过去一个时间点 (如具体的年、月、日期、钟点、1980, last month, half past six)。
I have been here since 1989.
2) since +一段时间+ ago
I have been here since five months ago.
3) since +从句
Great changes have taken place since you left.
Considerable time has elapsed since we have been here.
4) It is +一段时间+ since从句
It is two years since I became a postgraduate student.
From:https://www.zgghmh.com/CET-6/20008342.asp