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
B.happen;was walking
see sb do sth 所以接原型happen
而意思上是 当我正经过学校门口时看见的 又已经发生了 所以用过去进行时
Did you see the traffic accident yesterday?Yes ,I saw it ____ when I ____ past the school gate.
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
A.happen;walk B.happen;was walking C.happened;walking D.happening;have walked
英语人气：569 ℃时间：2019-10-19 13:39:30
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