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请教he________ when he saved the child from the fire答案是risked his life,为什么不用was risking his life?

题目详情
请教he________ when he saved the child from the fire
答案是risked his life,为什么不用was risking his life?
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答案和解析
这是对过去普通的叙述,用一般过去式,没有强调过去正在进行.如果从句改成was saving那么就用跟你说的了