问题描述：
这句英语是什么用法?
And If you ask whether it is true that an apple a day keeps the doctor away,a reasonable answer is that an apple every day will never do anybody harm unless you eat an rotten one.
这里的这个an apple every day will never do anybody harm 这个 do 是什么用法,这里是什么结构和意思?有什么说法吗?
And If you ask whether it is true that an apple a day keeps the doctor away,a reasonable answer is that an apple every day will never do anybody harm unless you eat an rotten one.
这里的这个an apple every day will never do anybody harm 这个 do 是什么用法,这里是什么结构和意思?有什么说法吗?
问题解答：
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