He ____for his mother at seven o'clock yesterday. A.was waiting B. waited 选哪个 说清楚语法知识点

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He ____for his mother at seven o'clock yesterday. A.was waiting B. waited 选哪个 说清楚语法知识点

He ____for his mother at seven o'clock yesterday. A.was waiting B. waited 选哪个 说清楚语法知识点
He ____for his mother at seven o'clock yesterday. A.was waiting B. waited 选哪个 说清楚语法知识点

He ____for his mother at seven o'clock yesterday. A.was waiting B. waited 选哪个 说清楚语法知识点
答案:A.
翻译:昨天七点钟的时候,他正在等待他的妈妈.
根据时间状语at seven o'clock yesterday“在昨天七点钟的时候”,表明句子谓语动作在过去的某一个时刻正在发生,所以用过去进行时最佳.
而B使用了一般过去时,它没有强调在过去某时刻某动作正在发生的含义.

选B
yesterday表示过去时,所以大多数动词后加ed

选A
“at seven o'clock"这是一个准确的时间,整个句子即是过去进行时,就这么简单。可以这么理昨天晚上七点他在干什么?他正在等他的妈妈。

选A 过去某个时间段正在进行的事,说明他七点的时候正在等他妈妈,过去进行时

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