2016年公共英语PETS4级语法精讲二

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.

• 2018年—2011年岩土工程师考试真题汇总
• 2019造价工程师《土建工程》模拟试题及答案（2）
• 2019年英语四级阅读理解专项练习（十六）
• 2019年英语四级阅读理解专项练习（十七）
• 2019年英语四级阅读理解专项练习（十八）
• 2020年二级建造师《市政实务》预习题及参考答案（10）
• 2019年房地产估价师考试制度与政策章节精讲题：城镇土地使用税
• 2020考研英语：暑期复习六大注意事项
• 2019年全国公共英语考试二级词汇和语法专项练习（3）
• 2020年监理工程师考试《案例分析》备考试题（9）