I wish I knew/I would know

I don't understand why with some verbs sucha as the one in "Who broke the Window?" we don' use " did" and why with other sucha us "Who did you see?" we don't have to use "did".
Does anybody knows?

"Who broke the window? - The subject is "who".
When the interrogative pronoun is the subject of the verb, we do not use the auxiliary verb - do, does or did.
When the interrogative pronoun is the object, we use an auxiliary verb.

"Who did you see?" - The subject is "you."

eg. These pairs of sentences ask the same question, but in #1, the subject is the in

I would like to add to Alphecca Stars' answer. Simply, if we find that we have to use 'Do' 'do, does or did' immediately before the verb, we ignore them. *Who did break the window?* is incorrect.
- What made him leave us? is correct.

what is the different bettween gone&went

AnonymousI would like to add to Alphecca Stars' answer.

Please don't.

Anonymous Simply, if we find that we have to use 'Do' 'do, does or did' immediately before the verb, we ignore them.

No, we don't ignore them. They give us the relative time (present, past).

Anonymous *Who did break the window?* is

Thanks, always happy to do a good job. Thank you,Cheers, Thanks for taking the time to let me know.

Hello, I am just curious about one thing. Shouldn't the sentence be "Whom did you see?". If not, please, could you explain the difference?

AnonymousWhom did you see?

That is fine for formal usage. Most of the time, however, we use "who" instead of "whom" at the beginning of a question in ordinary, everyday conversation.

CJ

Who is in place of a subject in a sentence whom is a replacement for an object . Subject verb object. Who did Elizabeth see? Margaret was the person whom Elizabeth saw. (Sounds odd these days because we dont use whom as much and replace it with who. A twisted sented Object subject verb To whom should I address this?