Persona non grata

Using "The cat chase" instead of "The cat chases" is a common, easy-to-fix subject-verb agreement error. Short rules, simple checks, copy-ready rewrites, and realistic examples for work, school, and casual writing follow.

If you wonder "Is this correct?" or "How do I fix it?", run the decision steps below and apply one of the rewrites immediately.

Quick answer: which is right?

Use "The cat chases" - add -s when the subject is a single third-person noun or pronoun (he, she, it). Do not add -s for plural subjects (they, cats).

Singular third person → verb + s (The cat chases).
Plural or non-third person → base verb (The cats chase; I/you/we/they chase).
Compound subjects joined by and → plural verb (Maria and Joe chase).
Ignore intervening phrases; identify the real subject (A box of tools sits on the floor → subject = box).

Core explanation: why "The cat chase" is wrong

Present-tense verbs change only for third-person singular: he/she/it runs, she writes, it chases. "The cat" equals third-person singular, so the verb needs -s: "The cat chases."

Quick method: find the subject, decide if it's singular or plural, then choose the verb form.

Rule: third-person singular → add -s; all others → base verb.
Step: identify subject → determine number → select the verb form.

Wrong: The cat chase the mice.
Right: The cat chases the mice.
Wrong: A pile of boxes sit by the door.
Right: A pile of boxes sits by the door.

Three quick decision steps to fix any sentence

When a verb feels wrong, follow these steps: 1) Find the subject. 2) Ask: singular or plural? 3) Use +s for third-person singular; base form otherwise.

Substitute a pronoun: use he/she/it (singular) or they (plural).
Ignore words between subject and verb (e.g., along with, plus, as well as).

Rewrite:
Original: The committee decide on Friday. Test with it → it decides. Result: The committee decides on Friday.
Rewrite:
Original: The cat chase the red dot. Test with it → it chases. Result: The cat chases the red dot.

Examples: everyday wrong/right pairs you can copy

Direct wrong → right pairs. Copy the correct sentence or swap in the corrected verb in your own writing.

Work - Wrong: The team agree on the new timeline.
Work - Right: The team agrees on the new timeline.
Work - Wrong: The CEO and founder decides the budget alone.
Work - Right: The CEO and founder decide the budget together.
Work - Wrong: Every manager in the office are expected to attend.
Work - Right: Every manager in the office is expected to attend.
School - Wrong: The class write a summary of the chapter.
School - Right: The class writes a summary of the chapter.
School - Wrong: The data shows a clear trend.
School - Right: The data show a clear trend.
School - Wrong: Each student have to submit the lab report.
School - Right: Each student has to submit the lab report.
Casual - Wrong: My best friend think pizza is overrated.
Casual - Right: My best friend thinks pizza is overrated.
Casual - Wrong: That cup of coffee make my morning.
Casual - Right: That cup of coffee makes my morning.
Casual - Wrong: The dog and cat fights over the toy.
Casual - Right: The dog and cat fight over the toy.

How to rewrite your sentence: short workshop

Fix the core (subject + verb) first, then add modifiers. Here are three originals with immediate corrections.

Pattern: [subject] + [verb (adjusted)] + [rest of sentence].

Rewrite:
Original: The cat chase across the yard when the mail carrier arrived.
Correct: The cat chased across the yard when the mail carrier arrived. (For a present sense: The cat chases the mail carrier across the yard.)
Rewrite:
Original: Our department believes the new policy change confuse staff.
Correct: Our department believes the new policy change will confuse staff. (Or: Our department believes the new policy changes will confuse staff.)
Rewrite:
Original: The list of errors are long and discouraging.
Correct: The list of errors is long and discouraging.

Spelling, hyphenation and forming the third-person singular

Most verbs add -s (run → runs). Change -y to -ies after a consonant (try → tries). Add -es for verbs ending in -o, -ch, -sh, -ss, -x (go → goes; watch → watches).

Do not hyphenate added -s. Hyphens belong to compound modifiers (well-known author) and do not affect verb endings.

Add -s normally; -y → -ies after a consonant; add -es for -o/-ch/-sh/-ss/-x endings.
Do not use a hyphen to mark conjugation.

Usage: Try → tries (She tries to finish on time.)
Usage: Go → goes (The bus goes downtown.)
Usage: Watch → watches (He watches the security feed.)

Try your own sentence

Test the whole sentence, not just the phrase. Context often makes the correct form obvious.

Spacing, punctuation and small traps around -s verbs

Possessives and contractions can look like plural subjects. "The cat's toy" = possessed by one cat; "the cats play" = plural subject + verb. Expand contractions (she's → she is / she has) to clarify meaning.

Ignore phrases like "along with", "as well as", "together with" - they do not make the subject plural.

Check apostrophes: don't use 's when you mean a plural subject.
Expand contractions and ignore intervening phrases when identifying the subject.

Wrong: The cat's chase the laser pointer every morning. (apostrophe error)
Right: The cats chase the laser pointer every morning.
Wrong: The prize, along with the certificates, are ready.
Right: The prize, along with the certificates, is ready.

Real usage and tone: collective nouns and regional choices

Collective nouns (team, committee, staff) often take singular verbs in American English when the group acts as one unit: The team wins. British English sometimes uses plural verbs to focus on members: The team are arguing.

Match your choice to tone and audience: use singular for unit-focused, formal writing; plural can be acceptable when emphasizing individual members (and is more common in UK usage).

Usage: The committee recommends the policy. (formal, unit-focused)
Usage: The committee are arguing among themselves. (emphasis on members)
Usage: The audience clapped when she finished her speech. (audience as a unit → singular verb)

Memory tricks and quick mnemonics

Use the "he/they" test: replace the subject with he/she/it or they. If he/she/it fits, add -s; if they fits, use the base verb.

Spot words that force singular: each, every; words that force plural: noun + and. Prepositional phrases do not change number.

He/They test: The cat → he chases; The cats → they chase.
'And' usually makes the subject plural; 'every' and 'each' make it singular.

Usage: He/They test: "The group meet monthly" → replace group with it (it meets) → The group meets monthly.

Similar mistakes to watch for

Some problems look like missing -s but are different: there is/there are, "the number of" vs "a number of", and relative clauses. Always find the true subject first.

Wrong: There is many options available.
Right: There are many options available.
Wrong: The number of errors are high.
Right: The number of errors is high.
Wrong: A series of tests were scheduled last week. (depending on emphasis)
Right: A series of tests was scheduled last week. (series = singular collective noun)

FAQ

Is "The cat chase" ever correct?

Not in standard present-tense third-person singular. It may appear in nonstandard dialects or headline shorthand, but the grammatical standard is "The cat chases."

How do I know if the subject is singular or plural?

Find the main noun performing the action and substitute a pronoun: he/she/it for singular, they for plural. If he/she/it fits, add -s; if they fits, use the base verb.

Which is correct: "The data shows" or "The data show"?

"Data" is technically plural (the data show) in formal writing. Many writers treat data as a singular mass noun (the data shows). Match your choice to your audience and style guide.

Why do some verbs add -es instead of -s?

Verbs ending in -o, -ch, -sh, -s, or -x usually add -es (go → goes; watch → watches) to maintain pronunciation and follow spelling rules.

What if a phrase between subject and verb is plural - does it change the verb?

No. Ignore intervening phrases like "along with", "as well as", or prepositional phrases when deciding verb number. The verb matches the main subject, not nearby nouns.

Quick check: make it painless

If you remain unsure, apply the three quick steps (find subject → ask singular/plural → substitute he/they) and choose a copy-ready rewrite above.

For a fast second opinion while you write, paste the whole sentence into a checker that highlights the subject and suggests the correct verb - it shows the fix and why it was made.