小編給大家?guī)?lái)公共英語(yǔ)考試二級(jí)口語(yǔ)輔導(dǎo)練習(xí)(18)，希望對(duì)大家有所幫助。下面就請(qǐng)大家跟隨小編的腳步一起來(lái)看看吧。希望各位備考公共英語(yǔ)二級(jí)的小伙伴們都能順利上岸~ 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.
