Did you see the traffic accident yesterday?Yes ,I saw it ____ when I ____ past the school gate.A.happen;walkB.happen;was walkingC.happened;walking D.happening;have walked为什么不选D see sb doing sth
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![Did you see the traffic accident yesterday?Yes ,I saw it ____ when I ____ past the school gate.A.happen;walkB.happen;was walkingC.happened;walking D.happening;have walked为什么不选D see sb doing sth](/uploads/image/z/7462156-4-6.jpg?t=Did+you+see+the+traffic+accident+yesterday%3FYes+%2CI+saw+it+____+when+I+____+past+the+school+gate.A.happen%3BwalkB.happen%3Bwas+walkingC.happened%3Bwalking+D.happening%3Bhave+walked%E4%B8%BA%E4%BB%80%E4%B9%88%E4%B8%8D%E9%80%89D+see+sb+doing+sth)
Did you see the traffic accident yesterday?Yes ,I saw it ____ when I ____ past the school gate.A.happen;walkB.happen;was walkingC.happened;walking D.happening;have walked为什么不选D see sb doing sth
Did you see the traffic accident yesterday?Yes ,I saw it ____ when I ____ past the school gate.
A.happen;walk
B.happen;was walking
C.happened;walking
D.happening;have walked
为什么不选D see sb doing sth
Did you see the traffic accident yesterday?Yes ,I saw it ____ when I ____ past the school gate.A.happen;walkB.happen;was walkingC.happened;walking D.happening;have walked为什么不选D see sb doing sth
应该选 B
你看见昨天的交通事故了吗?
是的,当我正经过校门口的时候看见了事故的发生.
如果选 D ,第一个空 用 happening 可以
但是第二个空用现在完成时与 时间状语 yesterday 不相符.
doing是指看见一个瞬间 不是指整个过程 完整的事件 如accident 就不能用。(在作任务呢望采纳感激不尽!)
see sb doing sth,表示 看到某人正在干某事
B.happen;was walkingsee sb doing sth,强调动作的持续性。所以不能用