新概念二第72课中的一句话.
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新概念二第72课中的一句话.
After his attempt, Campbell was disappointed to learn that his average speed had been 299 miles per hour.
这里为什么用had been?had been 在这里又是什么意思?
After his attempt, Campbell was disappointed to learn that his average speed had been 299 miles per hour.
这里为什么用had been?had been 在这里又是什么意思?
![新概念二第72课中的一句话.](/uploads/image/z/17682609-57-9.jpg?t=%E6%96%B0%E6%A6%82%E5%BF%B5%E4%BA%8C%E7%AC%AC72%E8%AF%BE%E4%B8%AD%E7%9A%84%E4%B8%80%E5%8F%A5%E8%AF%9D.)
这是一个宾语从句,主句的时态是过去的,所以对从句的时态有影响,把从句原来的一般过去时影响为过去完成时, had been 就是动词be在过去完成时的表现.过去完成时的结构为: 主语 + had been 或 主语 + had done