初中英語(yǔ)語(yǔ)法大全：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)作延續時(shí)間長(cháng)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)的句子都用現在完成時(shí)。

I worked here for more than twenty years.

(我現在已不在這里工作。)

I have worked here for many years.

(現在我仍在這里工作。)

小竅門(mén)：　當現在完成時(shí)+一段時(shí)間，這一結構中，我們用下面的公式轉化，很容易就能排除非延續動(dòng)詞在完成時(shí)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，它應改為 Harry got married six years ago.　或 Harry has been married for six years.

　　 歡迎使用手機、平板等移動(dòng)設備訪(fǎng)問(wèn)中考網(wǎng)，2023中考一路陪伴同行！>>點(diǎn)擊查看