what did she do?she had a haircut.中的what did she do 与what do you do 意思相同吗?为什么what do you do 是问工作的而前者不是呢?

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whatdidshedo?shehadahaircut.中的whatdidshedo与whatdoyoudo意思相同吗?为什么whatdoyoudo是问工作的而前者不是呢?whatdidshedo?s

what did she do?she had a haircut.中的what did she do 与what do you do 意思相同吗?为什么what do you do 是问工作的而前者不是呢?
what did she do?she had a haircut.
中的what did she do
与what do you do 意思相同吗?为什么what do you do 是问工作的而前者不是呢?

what did she do?she had a haircut.中的what did she do 与what do you do 意思相同吗?为什么what do you do 是问工作的而前者不是呢?
what did she do 她刚才(或在其他过去的时间里)干了什么?
表示一种过去发生的动作,与what do you do 的意思是不同的
若是问工作,则用一般现在时what does she do?
这个句型用一般现在时是对工作,职业的提问,用其他时态,就是对动作的提问了.

关键在于时态
what do you do 与 what does she do 都可以问工作,指现在、常常做的
what did you do 则指过去的某一个时间在干什么

what did she do? she had a haircut.
她做了什么?她剪了头发。
what do you do?
你是干什么的(习惯用法)

what did she do?她做了什么?根据she had a haircut.判断,问的是她做了什么。
what do you do?你是干什么工作的?
what do you do?是个固定表达