There was a big headline in the LA times this morning: "What secrets is he keeping?" I pointed this out to my wife, and she was bewildered. What's wrong with that? You would say "Is he keeping secrets?" Wouldn't you? Yes I would, but my grammar memory fails to find the subject-object-modifier-pronoun-discombobulation I need to explain it. When I change it to "What secrets are he keeping?" It doesn't sound any better after repeated iterations. "What secrets is those?" Even worse. My primitive gut feeling is that in the headline secrets is the subject and is plural, so requires "are." "Is he keeping secrets," the subject is he, singular.
Now I don't even remember who this guy was, or what secrets he might have been keeping.
Now I don't even remember who this guy was, or what secrets he might have been keeping.
