作业帮He said that he _____ his homework on last Saturday morning.
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He said that he _____ his homework on last Saturday morning.A.do B.did C.does D.was doing
并非因为句中出现具体时间就一定非要选 过去进行时
这题的解法首先看主句谓语动词是 said,是过去式
从句句尾又出现on last Saturday morning,上周六早晨,
那么我们立刻就可排除 AC,
剩下的 B did （一般过去时）和 D was doing （过去进行时）相比较
因为时间范围相对确定,所以选 D 更合适,
语境也合理表达：他说他上周六早晨正在做他的作业.
要是选项中没有 was doing 而出现 had done （过去完成时）,那也是优先选项
语境所表达的就完全不一样了,变成：他说他上周六早晨就写完他的作业了.
所以,并不是因为句中出现具体时间就绝对只有 过去进行时 能选.
这题的解法首先看主句谓语动词是 said,是过去式
从句句尾又出现on last Saturday morning,上周六早晨,
那么我们立刻就可排除 AC,
剩下的 B did （一般过去时）和 D was doing （过去进行时）相比较
因为时间范围相对确定,所以选 D 更合适,
语境也合理表达：他说他上周六早晨正在做他的作业.
要是选项中没有 was doing 而出现 had done （过去完成时）,那也是优先选项
语境所表达的就完全不一样了,变成：他说他上周六早晨就写完他的作业了.
所以,并不是因为句中出现具体时间就绝对只有 过去进行时 能选.
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