I'm good at conventions (grammar, punctuation, etc.), but the "is" and "are" always confuse me. Not things like "There is one cat" and "There are a lot of objects in the room," since those are pretty obvious, but the more complicated things because I never seem to remember what word to go by. What's grammatically correct? Conventions (grammar, punctuation, etc.) is one of my strongest points. Conventions (grammar, punctuation, etc.) are one of my strongest points. Just as I typed that, I remembered, but I want to make sure I remembered right. The first one would be correct because you go by "one," not "conventions," right?
I always thought it was "are" for many, and "is" for one. So if conventions is plural and not singular . . . I would say the second one. Conventions are one of my strongest points. It just sounds right. If you still don't know . . . Google.
Well, I can't find anything. I'm just going to go with "is." That sounds grammatically correct to me.