2012年04月17日 01時16分，《英語學(xué)習(xí):2012小升初英語語法復(fù)習(xí)：比較since和for》由出國留學(xué)網(wǎng)liuxue86.com英語編輯整理.
11.12 比較since和for
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 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(dāng)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.
11.12 比較since和for
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 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(dāng)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.