3.I happened____(meet)my old friend in the street yesterday.

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3.I happened____(meet)my old friend in the street yesterday.I____(not see)him for a long time
为什么不用had not seen

to meet hadn't seen(=had not seen)
1.happen to do sth 碰巧.
2.很久不见是相对happened to meet 这个特定的过去时点来说的,指的是“过去的过去”,所以用过去完成时
再问：但是答案是have not seen
再答：错！！！！看我的分析后你还认为原答案对？

3.I happened____(meet)my old friend in the street yesterday. I (h )to meet my old friend in the street yesterday 2.I______ (meet) my old friend in the street last week. I happened to meet a friend of mine in the street yesterday. 句型转换：I happened to meet an old friend of mine in the street. 英语.Yesterday I came across an old friend in the street.这里的in 英语单项选择：I met an old friend of ___ in the street yesterday mo I __ meet my old classmate in the street the day before yest I happened to meet her in the street yesterday. tom met his old friend in the street yesterday [用in the stre I met an old friend in the back store yesterday . I ____ ____meet my old friend yesterday.