11.10 比較過去時(shí)與現(xiàn)在完成時(shí)

　
　 3）現(xiàn)在完成時(shí)可表示持續(xù)到現(xiàn)在的動(dòng)作或狀態(tài)，動(dòng)詞一般是延續(xù)性的，如live, teach, learn, work, study, know.
　 過去時(shí)常用的非持續(xù)性動(dòng)詞有come, go, leave, start, die, finish, become, get married等。
　舉例：
　 I saw this film yesterday.
　?。◤?qiáng)調(diào)看的動(dòng)作發(fā)生過了。）
　 I have seen this film.
　?。◤?qiáng)調(diào)對現(xiàn)在的影響，電影的內(nèi)容已經(jīng)知道了。）　
　 Why did you get up so early?
　?。◤?qiáng)調(diào)起床的動(dòng)作已發(fā)生過了。）
　 Who hasn't handed in his paper?　
　?。◤?qiáng)調(diào)有卷子，可能為不公平競爭。）
　 She has returned from Paris.