What does jack have for lunch?为什么不可以是.what did jack have for lunch?

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Whatdoesjackhaveforlunch?为什么不可以是.whatdidjackhaveforlunch?Whatdoesjackhaveforlunch?为什么不可以是.whatdidjac

What does jack have for lunch?为什么不可以是.what did jack have for lunch?
What does jack have for lunch?为什么不可以是.
what did jack have for lunch?

What does jack have for lunch?为什么不可以是.what did jack have for lunch?
可以是,但意思不同:What does Jack have for lunch?是一般现在时的疑问句,表示的意思是Jack中饭经常吃些什么.“What did Jack have for lunch?" 是一般过去时,指刚刚过去的那顿中饭,Jack吃的是什么.

不同的时态。用what did Jack have for lunch?意思是:Jack中午吃了什么?
用What does jack have for lunch?则是:Jack中午吃什么?

句子脱离语境没有意义,不是错,是不符合语境

不应该这样解释,我理解错误,一楼和二楼说法是对的,