___ crossing the street ,he was knocked down by a car.选项:a、B

___ crossing the street ,he was knocked down by a car.选项:a、By b、During c、At d、While
什么不能选 while 请讲明原因

敛于心 1年前已收到2个回答举报

共回答了22个问题采纳率：95.5% 举报

While crossing the street ,he - -- - - -
答案是while,不是during.你的句子是分词结构,可以改写成：while he was crossing the street,he - - -- - -
在分词结构里面,你的句子是while+现在分词.记住,during+名词短语.所以B是错误的选项.
又如
While( he was) staying in Shanghai,he visited me
===During his stay in Shanghai,he visited me
记住：while+ 现在分词,during+名词短语

1年前

tangfok 幼苗

共回答了3个问题举报

因为上下文中可能要说明的是在“什么时候”被撞的，强调时间概念。而不是强调他在“什么情况”下被撞的！如果单纯从语法角度看，两都都能用！

1年前

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你能帮帮他们吗

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