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小學(xué)英語(yǔ)語(yǔ)法知識(shí)點(diǎn):比較since和for

來(lái)源:網(wǎng)絡(luò)資源 文章作者:奧數(shù)網(wǎng)整理 2018-11-13 19:21:49

小學(xué)英語(yǔ)語(yǔ)法知識(shí)點(diǎn):比較since和for

  Since 用來(lái)說(shuō)明動(dòng)作起始時(shí)間,for用來(lái)說(shuō)明動(dòng)作延續(xù)時(shí)間長(zhǎng)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(shí)間狀語(yǔ)的句子都用現(xiàn)在完成時(shí)。

  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(shí)+一段時(shí)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(dòng)詞在完成時(shí)中的誤使。

  1)(對(duì)) Tom has studied Russian for three years.= Tom began to study Russian three years ago, and is still studying it now.

  2)(錯(cuò)) 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(duì),它應(yīng)改為 Harry got married six years ago. 或 Harry has been married for six years.

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