延續(xù)動(dòng)詞與瞬間動(dòng)詞
1) 用于完成時(shí)的區(qū)別
延續(xù)動(dòng)詞表示經(jīng)驗(yàn)、經(jīng)歷； 瞬間動(dòng)詞表示行為的結(jié) 果,不能與表示段的時(shí)間狀語連用.
He has completed the work.他已完成了那項(xiàng)工作.(表結(jié)果)
I've known him since then.我從那時(shí)起就認(rèn)識(shí)他了.(表經(jīng)歷)
2) 用于till / until從句的差異
延續(xù)動(dòng)詞用于肯定句,表示"做……直到……" 瞬間動(dòng)詞用于否定句,表示"到……,才……"
He didn't come back until ten o'clock.
他到10 點(diǎn)才回來.
He slept until ten o'clock.
他一直睡到10點(diǎn).
典型例題
1.You don't need to describe her.I ___ her several times.
A.had met B.have met C.met D.meet
答案B.首先本題后句強(qiáng)調(diào)對現(xiàn)在的影響,我知道她的模樣,你不用描述.再次,several times告知為反復(fù)發(fā)生的動(dòng)作,因此用現(xiàn)在完成時(shí).
2.---I'm sorry to keep you waiting.
---Oh,not at all.I ___ here only a few minutes.
A.have been B.had been C.was D.will be
答案A.等待的動(dòng)作由過去開始,持續(xù)到現(xiàn)在,應(yīng)用現(xiàn)在完成時(shí).
以上參考自《英語語法精解書籍》