小升初英语语法复习：since的四种用法 标签：小升初教育新闻

1) since +过去一个时间点(如具体的年、月、日期、钟点、2023, last month, half past six)。

I have been here since 2023.

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.