初学英语注意since和for的区别用法

　　since和for这两个单词最大的区别在于：Since 用来说明动作起始时光，for用来说明动作持续时间长度。初学英语例句如下：

　　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. 内容来自

　　Some new oilfields have been opened up since 1976. CopyRight .com

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

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

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

　　留心：初学英语时注意并非有for 作为时间状语的句子都用当初实现时。

　　I worked here for more than twenty years. 内容来自

　　(我现在已不在这里工作。) 内容来自

　　I have worked here for many years.

　　(当初我仍在这里工作。)

　　小窍门：　当现在完成时+一段时间，这一结构中，咱们用下面的公式转化，很容易就能打消非连续动词在实现时中的误使。 内容来自

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

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

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　　2)　(初学英语容易犯的错误说法) Harry has got married for six years.

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

　　显然，第二句过错，它应改为 Harry got married six years ago.　或 Harry has been married for six years.

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