Who did come? Emphatic or ill-formed question?

Hi everyone!

Today in the class I and my students were analyzing how questions are formed in the past tense in English. In one of the exercises, the task was to find mistakes in sentences and correct them. One sentence read: Who else did come? I think the aim of the author was to have us correct Who else did come? into Who else came?, since "who" in this case functions as the subject of the question, and no inversion is needed. Now, one of my students told me that the other question order, namely "Who else did come?", didn't sound wrong to him. I started wondering why this could be so, and I reached the conclussion that it might be because there is the possibility of having "emphatic questions". Am I right here? What I'm trying to say is that if you want to make a question about a subject emphatic, then it could have the structure: Who + did/ does + infinitive. E.g.:

B: Tell me, A, who went to the party?

A: Well, Emma finally didn't show up. I imagine she was too busy. Jack was ill, so he didn't come either and Rachel had to stay home with her children.

B: Well, so who DID come, then?

I don't know why, but I can't think of a situation in which "Who else DID come"? would be appropriate. Maybe it's because of its emphatic nature, and "else" implies that at least someone came, so the emphatic use would sound strange in such a construction. However, now that I come to think of it, what do you think about...


B: Tell me, A, who went to the party?

A: David came with his wife. Emma finally didn't show up. I imagine she was too busy. Jack was ill, so he didn't come either and Rachel had to stay home with her children.

B: So who else DID come? (i.e., besides David)

Are my appreciations ok?

Thanks a lot!

Mara.