As my father ____(leave)the house,the postcard ____(arrive).这道题让我们弄清楚过去进行时和一般过去式.第一个空我填was leaving ,第二个空填was arrived.第二个空为什么填错了?As I ____(walk)down the street

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Asmyfather____(leave)thehouse,thepostcard____(arrive).这道题让我们弄清楚过去进行时和一般过去式.第一个空我填wasleaving,第二个空填was

As my father ____(leave)the house,the postcard ____(arrive).这道题让我们弄清楚过去进行时和一般过去式.第一个空我填was leaving ,第二个空填was arrived.第二个空为什么填错了?As I ____(walk)down the street
As my father ____(leave)the house,the postcard ____(arrive).这道题让我们弄清楚过去进行时和一般
过去式.第一个空我填was leaving ,第二个空填was arrived.第二个空为什么填错了?As I ____(walk)down the street,I ____(meet)Charlie.还有While moter_____(prepare)lunch,Janet___(set)the table.不要专业术语,越容易懂越好!

As my father ____(leave)the house,the postcard ____(arrive).这道题让我们弄清楚过去进行时和一般过去式.第一个空我填was leaving ,第二个空填was arrived.第二个空为什么填错了?As I ____(walk)down the street
As在这里引导时间状语从句,意思是“正当……的时候”相当于while,题目是说正当爸爸离开屋子的时候,明星片到了.这句话的是和别人说的,是回忆,属于过去时.用arrived,没有be arrived的说法.arrive是不及物动词没有被动.sth arrived就可以了.
同样:
As I was walking down the street,I met Charlie.(后一句是对当时情况的描述,由于meet是一个瞬间动作,也就是短暂性动词,用过去式就好了)
While mother was preparing lunch,Janet was setting the table.(当妈妈在准备午餐的时候,简特在摆放桌子,准备和摆放是延续性动作,有过去进行的时态)