Where was it invented [ in ] 如果不用,为什么Who was it invented 有个by

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Where was it invented [ in ] 如果不用,为什么Who was it invented 有个by
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Where was it invented [ in ] 如果不用,为什么Who was it invented 有个by
Where was it invented [ in ] 如果不用,为什么Who was it invented 有个by

Where was it invented [ in ] 如果不用,为什么Who was it invented 有个by
1.Where was it invented?
没有in.因为where是一个副词,是疑问副词,副词不与介词连用.疑问副词有:when,where,why,how.疑问副词在句中作状语.
2.Who was it invented by?
这里有by.因为who是一个代词,是疑问代词.疑问代词有who,whom,what,which.疑问代词在句中作主语、宾语或表语.
不明白的再问哟!请记得采纳,多谢!

【发明】这个动作一定是【人】发出来的,
所以当用人来提问的时候肯定用by,其他情况一概不用

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