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哪位学霸能告诉我when和while的的用法和区分

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哪位学霸能告诉我when和while的的用法和区分
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答案和解析
while 后面是be动词+doing sth.
例如:While I was eating,my brother was doing homework.
when 后面是动词过去式
例如:When it began to rain,Ben was helping his mom.