Who came up with the good idea yesterday?为什么在who后面加did

Who came up with the good idea yesterday?为什么在who后面加did
Why not try on the jeans?不写为why didn't you try on the jeans?
不好意思，第一句打错了，我说的是为什么who后面不加did ,总觉得这两句的用法于通常不同，第一句一般说，who come up with....可是这里却说who came 注意第一句写的是came,不是come，能否说一下这两句为什么要这样，

新时代的唐伯虎 1年前已收到3个回答举报

红衫树幼苗

共回答了20个问题采纳率：95% 举报

句子基本结构：主语+谓语+宾语
did是行为动词可做谓语,came up with也是动词做谓语一个句子不需要两个动词做谓语.它们在句子中所起的作用是一样的.
第二句,你写的两个从语法上讲都是对的,但第一个更简洁,老外都喜欢这么用.你知道有些东西口语化了,就没有什么为什么了.

1年前

checkairman 幼苗

共回答了1个问题举报

came是过去式，如果加了did的话，那么就应该是come。所以不加did。

1年前

wnlxl123 幼苗

共回答了3个问题举报

陈述句是he/she came up with the good idea yesterday.变成疑问要叫助动词啊，过去时是did。Who did come up with the good idea yesterday？
Why not try on the jeans?和why didn't you try on the jeans?好像都对吧。

1年前

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你能帮帮他们吗

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