Practical English Usage, Michael Swan, Third edition, Page 525
When who and what are used to ask for the subject of a clause, they most often have singular verbs, even if the question expects a plural answer.
How about this one? Is it correct to ask:
A: Who is speaking?
Q: John and David are speaking.
For this answer:
A: Who is speaking together?
Q: John and David are speaking together.
Rain Lover How about this one? Is it correct to ask:A: Who is speaking together? No.
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.
Rain LoverHow about this one? Is it correct to ask:A: Who is speaking together?No. It's not very idiomatic. Try the following instead.
Thanks for the answer, but I wonder what's wrong with it grammatically speaking.
It's not very idiomatic.
Rain Loverwhat's wrong with it grammatically speaking.The grammar is fine, but we don't use the expression "speaking together". It's a usage problem, not a grammar problem.