Is it "how are the dog and the cat" or "how is the dog and the cat"?

[Eren8hisfather]

Hello,
With inverted compound subjects, do we use a singular or plural verb?
For example, should we say "how is the dog and the cat" or "how are the dog and the cat"?
I'm leaning towards "are" because it is a compound subject, thus plural. But maybe it is a syllepsis, "how is the dog and [how is] the cat"...
What about similar sentences? --> why is/are... what is/are... who is/are...
So do we use a plural verb or a singular for "what is/are a proton and an electron"?
surely they follow the same structure?
Thank you very much.

 

[5jj]

Use a plural verb.

 

[Rover_KE]

Eren8his father, I see you posted the same thread here.

Please don't post the same question to different forums simultaneously. Post on one forum only, wait for responses and then, only if you are disappointed with/confused by the responses (or there aren't any), post on another forum and include a link to the first forum thread.

(emsr2d2)