固安暑假高中英语家教

培训地址：固安县106国道东侧建行南100米 佳诚文化

固安暑假高中英语家教

课程和辅导方案请咨询：185-3163-1983 (微信同号)  微信号：guanEnglish

辅导编号：May05- 2019

高中英语家教/初中英语家教/小学英语家教

固安县暑假英语家教

以课本为基础 又高于课本，着重提高学生的英语听说读写的能力，为学生的英语学习打下坚实的学习基础。

初中英语教学讲解实例:比较since和for

Since 用来说明动作起始时间，for用来说明动作延续时间长度。

I have lived here for more than twenty years.

I have lived here since I was born..

My aunt has worked in a clinic since 1949.

Some new oilfields have been opened up since 1976.

I have known Xiao Li since she was a little girl.

My brother has been in the Youth League for two years.

I have not heard from my uncle for a long time.

注意:并非有for 作为时间状语的句子都用现在完成时。

I worked here for more than twenty years.

(我现在已不在这里工作。)

I have worked here for many years.

(现在我仍在这里工作。) 培训地址：固安县106国道东侧建行南100米 佳诚文化

小窍门: 当现在完成时+一段时间，这一结构中，我们用下面的公式转化，很容易就能排除非延续动词在完成时中的误使。培训地址：固安县106国道东侧建行南100米 佳诚文化 

1) (对) Tom has studied Russian for three years.

= Tom began to study Russian three years ago, and is still studying it now.

2) (错) Harry has got married for six years.

= Harry began to get married six years ago, and is still getting married now.

显然，第二句不对，它应改为 Harry got married six years ago. 或 Harry has been married for six years. 培训地址：固安县106国道东侧建行南100米 佳诚文化

13. 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.

培训地址：固安县106国道东侧建行南100米 佳诚文化