1.直接转化成延续性动词buycatch(get)acoldborrowcome/go/become/reachhavehaveacoldkeepbe短暂性动词延续性动词borrow----keepbuy------havedie------bedeadleave----beaway(from)open-----beopenclose---beclosedcome/go---be2.转换成be+介词短语jointhearmyjointhePartygotoschoolbeinthearmybeinthepartybeinaschool3转换成be+形容词或副词diefinishbeginleavefallasleepcloseopenbedeadbeoverbeonbeawaybeasleepbeclosedbeopen1.Howlongcanthey___________(借)thebook?2.They___________(借)thebooksinceaweekago.3.Lucy_____________________(离开)schoolforhalfanhour.4.Hisdog_______________(死)forthreedays.5.They____________(买)theoldhousesince1960.6.Thisshop________________________(开/关)sincetwoyearsago.7.John________________(来)inChinafortenyears.keephavekepthasbeenawayfromhasbeendeadhashadhasbeenopen/closedhasbeen1.我买了这辆自行车已经两年了。（buy---have）I________thebiketwoyearsago.When_____you______thebike?I________thebikefortwoyears.Howlong_____you______thebike?2.自从上星期以来,我就借了这本书.(borrow---keep)I_______thebooklastweek.When_____you______thebook?I___________thebooksincelastweekHowlong_____you______thebook?3.电影开始了一小时了.(start---beon)Thefilm________anhourago.When_______thefilm______?Thefilm____________________foranhour.Howlong_____thefilm_____________?boughtdidbuyhavehadhavehadborroweddidborrowhavekepthavekeptdidstartstartedhasbeenonhasbeenon4.MrBlack死了三年了.(die---bedead)MrBlack________threeyearsago.When______Mr.Black_____?MrBlack____________________forthreeyears.Howlong______Mr.Black_____________?5.他在半小时前已离开。(leave---beaway)He_____halfanhourago.When______he_______halfanhourago?He______________forhalfanhour.Howlong______he______________?dieddiddiehasbeendeadhasbeendeaddieddiddiehasbeendeadhasbeendead6.他们10年前已结婚了。(getmarried---bemarried)They____________tenyearsago.When_____they_____?They______________________fortenyears.Howlong______they______________?7.他在这所学校已经两年了。(gotothisschool,beinthisschool）He______tothisschooltwoyearsago.He_________inthisschoolfortwoyears.gotmarrieddidmarryhavebeenmarriedhavebeenmarriedwenthasbeen
