by RonPurewal Fri Dec 18, 2015 7:26 am
i'm going to assume that your question is about these kinds of verbs in general, and not literally about the two verbs 'is' and 'are'.
ok, so, you know what's the best thing about questions like this one?
you can almost always answer them yourself!
real talk: if you just open up the OG and flip through it, you'll be able to answer almost every question of this kind—and, along the way, you'll learn much more than if someone on a forum just tells you the answers.
e.g., if you flipped through the 2016 OG you'd quickly find the following:
• diagnostic #46 (= a sentence within a larger sentence, but, still, exactly the sort of thing you're asking about)
• SC #26
... among others.