Hello. In interrogative sentences with question words, we usually put an auxiliary verb after the question words. But, if I'm not mistaken, we can't use that pattern to "who". Am I right? We don't say, "Who did steal it?" but "Who stole it?" Why is so? Thank you.
Top answer
It depends on whether the question word is subject or object: Who stole the tarts? What did the knave steal? Who did he talk to?
— Mister Micawber
It depends on whether the question word is subject or object: Who stole the tarts?
What did the knave steal?
Who did he talk to?
What makes the world go round?
Which hole did Alice fall into?
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It depends on whether the question word is subject or object:
Who stole the tarts? What did the knave steal? Who did he talk to? What makes the world go round? Which hole did Alice fall into? Which hole appeared before her?