五官中郎将初中英语语法since和for用法讲解.doc

2021年1月13日发(作者：窦智孔)
初中英语语法since和for用法讲解

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。
例如：
I have lived here for more than twenty years.我住在这儿二十多年
了。
I have lived here since I was born. 我从出生起就住在这儿了。
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。)
注意：用句型转换的方法，很容易排除非延续动词在有for/since
结构的完成时中的误用。
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.
同学们，看看since和for的用法比较，大家有没有清楚一点呀，
多多看看哦。