Singular vs Plural – Do I Use ‘Was’ or ‘Were’?

singular-vs-plural

I wanted to say "I think the primary use case for USB A were thumbdrives" but I am utterly unsure whether it's "was" because the primary use case or it's "were" because thumbdrives.

Best Answer

"I think the primary use case for USB A was thumb drives."

"Use case" is the subject of the verb, and it's singular, so "was" is correct.