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一般过去时和过去进行时的小问题

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一般过去时和过去进行时的小问题
按适当形式填空
We ___1____(look) out of the window of the plane and ____2___(see) that we ____3____(fly) over the mountain
1 look 改成looked 是因为什么(思路)
2 see 改成saw 是因为什么(思路)
3 fly 改成were flying 是因为什么(思路)
附注:这是练习前的知识要点,请顺便也翻译一下,也许跟本题有关
The past continuous vs.the simple past
Use the past continuous to describe an action in progress at that time.Use the simple past to describe a completed action:
She was getting into the taxi when I called.
She got into the car and drove away.
When there two actions,the longer action is usually in the past continuous.It is interrupted by the shorter action in the simple past:
I was taking a shower when the phone rang.
一般过去时和过去进行时的小问题
1 look 改成looked 是因为什么(思路)
2 see 改成saw 是因为什么(思路)
3 fly 改成were flying 是因为什么(思路)
因为那整件事情都已经过去了,
事情过了的1秒后开始 就得用过去式.