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。)
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。
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.
句子成分:主语 - 大学英语语法大全
英语短剧 三只小猪
句子成分:谓语 - 大学英语语法大全
简单句:反义疑问句 2- 大学英语语法大全
小依超雷英语短剧
句子成分:表语 - 大学英语语法大全
南京市小学英语短剧比赛
grow、plant、keep的区别: - 大学英语语法大全
英语小短剧 龟兔赛跑(经典)
小学英语短剧视频 老虎拔牙
简单句:祈使句 - 大学英语语法大全
句子成分:宾语 - 大学英语语法大全
英语短剧 蚯蚓开大会
三人英语搞笑短剧 顾客与服务员
小学英语短剧比赛视频
英语短剧 瞎子和小野兽
简单句:一般疑问句 - 大学英语语法大全
英语搞笑短剧 老虎拔牙
英语小短剧 小蝌蚪找妈妈
英语短剧 下金蛋的鹅
fall 、drop的用法区别 - 大学英语语法大全
简单句:选择疑问句 - 大学英语语法大全
简单句:一般疑问句的否定结构 - 大学英语语法大全
英语短剧 The Little Red Hen
英语短剧 小红狗
be amazed与be surprised的区别 - 大学英语语法大全
小学英语短剧第一名视频
英语短剧 孔雀东南飞之第五幕
warn的用法 - 大学英语语法大全
carry on、carry out的区别 - 大学英语语法大全
不限 |
英语教案 |
英语课件 |
英语试题 |
不限 |
不限 |
上册 |
下册 |
不限 |