公共英语二级语法讲解（3）
浏览
收藏
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。)
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.
最新资讯
- 9月21日至22日考试！2024年下半年公共英语写作用词及表达备考词汇2024-09-05
- 2023年备考攻略：公共英语推理判断题答题技巧2023-06-24
- 2023年备考攻略：公共英语(全国英语等级考试)写作五大注意事项2023-06-11
- 2023年下半年公共英语(全国英语等级考试)备考攻略：学好口语的六大技巧2023-06-04
- 2023年下半年公共英语(全国英语等级考试)备考攻略：选词填空答题技巧2023-05-29
- 2023年下半年公共英语(全国英语等级考试)备考攻略：完形填空答题技巧2023-05-10
- 2023年下半年公共英语(全国英语等级考试)备考攻略：听力答题技巧2023-05-04
- 2023年下半年公共英语(全国英语等级考试)备考指南：写作技巧2023-05-02
- 2023年下半年公共英语备考指南：公共英语备考方法2023-04-30
- 2023年下半年公共英语（全国英语等级考试）备考攻略：迅速提高阅读能力的三个技巧2023-04-25
打卡人数
