小學(xué)六年級英語語法講解之比較since和for

　　英語的應(yīng)用越來越廣泛了，我們必須好好來學(xué)習(xí)英語知識。對此小學(xué)頻道編輯為大家整理了小學(xué)六年級英語語法講解：比較since和for。詳情如下：

　　Since用來說明動作起始時間，for用來說明動作延續(xù)時間長度。

　　I have lived here for more than twenty years.

　　I have lived here since I was born.

　　My aunt has worked in aclinic since 1949.

　　Some new oil fields have beeno pened up since1976.

　　I have known XiaoLi since she was a little girl.

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

　　Ihavenotheardfrommyuncleforalongtime.

　　注意：并非有for作為時間狀語的句子都用現(xiàn)在完成時。

　　I worked here for more than twenty years.

　　(我現(xiàn)在已不在這里工作。)

　　I have worked here for many years.

　　(現(xiàn)在我仍在這里工作。)

　　小竅門： 當現(xiàn)在完成時+一段時間，這一結(jié)構(gòu)中，我們用下面的公式轉(zhuǎn)化，很容易就能排除非延續(xù)動詞在完成時中的誤使。

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

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

　　2) (錯)Harry has got married for six years.

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

　　顯然，第二句不對，它應(yīng)改為Harry got married six years ago. 或Harry has been married for six years.

　　希望大家能夠認真閱讀這篇小學(xué)六年級英語語法講解：比較since和for，以便在英語學(xué)習(xí)上取得優(yōu)異的成績。

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