When does he does morning exercises 修改病句

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When does he does morning exercises 修改病句

答案:把第二个does修改成do
即:When does he do morning exercise?
解析:因为这是一般现在时的疑问句,前面已经有助动词does,是动词单三形式,后面的实义动词就要用动词原形了,即do
翻译:他什么时候做早操?
有不明白的请继续追问,

正确答案应该是:When does he do morning exercises

把后面的“does”改为“do" 正确答案是 :“When does he do morning exercises。”