5、HehasbeenaLeaguememberforthreeyears.(是团员的状态可持续)句子中如有过去时的时间副词(如yesterday,last,week,in1960)时,不能使用现在完成时,要用过去时。改错:Tomhaswrittenalettertohisparentslastnight.Ihaveseenthefilmtwicelastmonth.sawfor和since的运用for表“经历(一段时间)”,而since表“自从……以来”。例如:1.He has stayed her
6、efor 3 hours.2.He has stayed heresince 3 hours ago.3.He has stayed heresince 3 o’clock.4.He has taught Englishsince he came here.Fillintheblankswith“for”or“since”:Wehavehadthenewcomputer_______aweek.HowlonghaveyoustudiedEnglish?IhavestudiedEnglish___