概要：初中英语since的用法语法讲解1) since +过去一个时间点(如具体的年、月、日期、钟点、1980, last month, half pastsix)。例如：I have been here since 1989. 1989起，我一直在这儿。2) since +一段时间+ ago。例如：I have been here since five months ago. 我在这儿，已经有五个月了。3) since +从句。例如：Great changes have taken place since you left. 你走后，变化可大了。Great changes have taken place since we were here. 我们走后，变化可大了。4) It is +一段时间+ since从句。例如：It is two years since I became a postgraduate student. 我考上研究生有两年了。编辑推荐初中英语语法：介词短语整理1.介词+动名词: in doing so, to my saying that2.介词

初中英语since的用法语法讲解

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)。例如：

I have been here since 1989. 1989起，我一直在这儿。

2) since +一段时间+ ago。例如：

I have been here since five months ago. 我在这儿，已经有五个月了。

3) since +从句。例如：

Great changes have taken place since you left. 你走后，变化可大了。

Great changes have taken place since we were here. 我们走后，变化可大了。

4) It is +一段时间+ since从句。例如：

It is two years since I became a postgraduate student. 我考上研究生有两年了。

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初中英语语法：介词短语整理

1.介词+动名词: in doing so, to my saying that

2.介词+连接副词/连接代词/what从句:over what he had better do

3.介词+名词：at the door, into the bag

4.介词+代词: for me, of others

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初中英语语法：时间介词整理

(1)at,in , on 在……时

at表示某一时刻或较短暂的时间，或泛指圣诞节，复活节等。

如: at 3:20, at this time of year, at the beginning of, at the end of …,

at the age of …, at Christmas， at night, at noon, at this moment

在last, next, this, that, some, every 等词之前一律不用介词

如：We meet every day.