Subject-Verb Agreement Mistakes That Slip Past Spell Check

"The list of items are on the table" sounds almost right if you read it fast, which is exactly why this mistake survives so many drafts. The subject is "list," not "items," and "list" is singular, so the verb should be "is." Your ear gets fooled by the noun sitting right next to the verb, even though it's not the actual subject.

Where This Actually Breaks Down

Subject-verb agreement mistakes cluster around a few specific patterns, not random bad luck. The most common is a long prepositional phrase sitting between the subject and verb: "the box of old photographs were donated" should be "was donated," because the subject is "box," singular, and "of old photographs" is just describing which box, not adding to the count. The farther the subject sits from its verb, the more likely a writer defaults to matching whatever noun is closest.

Collective Nouns Are Their Own Trap

"The team is winning" or "the team are winning" both show up depending on which side of the Atlantic you're writing for. American English generally treats collective nouns like "team," "committee," and "staff" as singular ("the committee has decided"), while British English often treats them as plural when emphasizing the individuals within the group ("the committee have decided"). Neither is wrong exactly, but pick one convention and stay consistent within a single document, since switching mid-paragraph reads as an error even when each individual sentence would be fine on its own.

A Mini Scenario

You write "neither the manager nor the employees was aware of the policy change." This one trips up even careful writers: with "neither/nor" and "either/or" constructions, the verb agrees with whichever subject is closer to it, so "employees was" is wrong, it should be "employees were." Flip the order to "neither the employees nor the manager was aware" and the verb correctly switches back to singular, because now "manager" is closer.

Why Grammar Checkers Miss Some of This

Automated tools catch obvious mismatches but often stumble on the same long-phrase and either/or patterns that trip up humans, because the software is pattern-matching nearby words rather than actually parsing which noun is grammatically the subject. This is a case where reading your sentence aloud slowly, specifically pausing right before the verb, catches errors that a quick visual scan or an automated pass both miss.

A Quick Fix Habit

When a sentence has a long subject, mentally delete everything between the true subject and the verb, and check if the sentence still sounds right in its stripped-down form. "The box [of old photographs] was donated" stripped down reads as "the box was donated," which confirms the singular verb is correct. This trick works for most agreement errors and takes about two seconds once it's a habit. UNC's writing resources and Merriam-Webster's grammar guidance are both useful for checking a specific pairing when the sentence still sounds ambiguous even after stripping it down. This particular error is also common in sentences built around a paraphrased source, since restating someone else's claim in your own words sometimes stretches the subject further from the verb than the original sentence had it; UNC's guide to paraphrasing is worth a look if you notice this happening specifically when you're restating research findings. And once the sentence reads cleanly, Purdue OWL's broader grammar resources cover a few related agreement patterns worth knowing, including how indefinite pronouns like "each" and "everyone" always take a singular verb even when they feel like they're referring to a group. If you're checking this in a piece involving cited sources, note that citation format follows its own separate rules, whether you're using APA or another system, and one shouldn't be confused for the other.