小學六年級英語語法
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。
Ihavelivedhereformorethantwentyyears.
IhavelivedheresinceIwasborn..
Myaunthasworkedinaclinicsince1949.
Somenewoilfieldshavebeenopenedupsince1976.
IhaveknownXiaoLisinceshewasalittlegirl.
MybrotherhasbeenintheYouthLeaguefortwoyears.
Ihavenotheardfrommyuncleforalongtime.
注意:并非有for作為時間狀語的句子都用現(xiàn)在完成時。
Iworkedhereformorethantwentyyears.
(我現(xiàn)在已不在這里工作。)
Ihaveworkedhereformanyyears.
(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)TomhasstudiedRussianforthreeyears.
=TombegantostudyRussianthreeyearsago,andisstillstudyingitnow.
2) (錯)Harryhasgotmarriedforsixyears.
=Harrybegantogetmarriedsixyearsago,andisstillgettingmarriednow.
顯然,第二句不對,它應(yīng)改為Harrygotmarriedsixyearsago. 或Harryhasbeenmarriedforsixyears.
【小學六年級英語語法】相關(guān)文章: