Let me trough (through)!

A missing -s (The dog chase → The dog chases) is a common, easy-to-fix error. Below are the exact rules, fast repair steps, memory tricks, and plenty of copy-ready examples for work, school, and casual writing.

If you want a quick check, use the checklist and the rewrites to correct sentences instantly.

Quick answer

When the subject is third-person singular (he, she, it, or a singular noun), use the verb form with -s / -es / -ies: write "The dog chases," not "The dog chase."

Singular third person → verb + s (the dog chases; she runs).
I / you / we / they → base verb (I run; they run).
Quick trick: substitute he/she/it - if that sounds right, add -s to the verb.

Core rule: third-person singular takes -s

In the present simple, third-person singular subjects change the verb: add -s, add -es after certain endings, or change -y to -ies. This is required in standard written English.

Add -s: chase → chases, play → plays.
Add -es after -s, -sh, -ch, -x, -z: watch → watches, fix → fixes.
Change consonant + y → -ies: try → tries (but play → plays because y follows a vowel).

Wrong: The dog chase the ball.
Right: The dog chases the ball.
Wrong: She study every night.
Right: She studies every night.

Why the error happens (practical causes)

Writers drop the -s for a few predictable reasons: thinking in plural terms, typing fast, translating from a language without this inflection, or importing spoken/dialect forms into writing. Long phrases between subject and verb also hide the mistake.

Translation or L1 interference removes inflections.
Casual speech and texts often omit the -s, and that carries into drafts.
Intervening phrases (The team in the corner...) make agreement harder to spot.

Wrong: The team in the corner chase a different metric each week.
Right: The team in the corner chases a different metric each week.

How to fix your sentence - checklist and rewrites

Checklist: 1) Find the grammatical subject. 2) Is it singular third person? 3) If yes, change the verb to -s/-es/-ies. 4) Read aloud to confirm.

Identify the subject, not a nearby noun.
Substitute he/she/it: if it fits, use the -s form.
Remember: auxiliaries/modals use the base verb (He will chase, not He will chases).

Rewrite: The dog chase the ball → The dog chases the ball.
Rewrite: My colleague chase deadlines → My colleague chases deadlines.
Rewrite: Every student chase the teacher's attention → Every student chases the teacher's attention.
Rewrite: The box of supplies chase attention → The box of supplies chases attention.

Examples and practice - work, school, and casual

Each pair below shows an incorrect original and a corrected sentence you can use in emails, reports, essays, or posts.

Work - Wrong: The manager chase the new hire for an update.
Work - Right: The manager chases the new hire for an update.
Work - Wrong: Each analyst chase the weekly metrics and report them.
Work - Right: Each analyst chases the weekly metrics and reports them.
Work - Wrong: My assistant chase low-priority tasks so I can focus on strategy.
Work - Right: My assistant chases low-priority tasks so I can focus on strategy.
School - Wrong: Every student chase the teacher's attention before presentations.
School - Right: Every student chases the teacher's attention before presentations.
School - Wrong: The biology student chase the frog during the lab exercise.
School - Right: The biology student chases the frog during the lab exercise.
School - Wrong: The class representative chase signatures for the petition.
School - Right: The class representative chases signatures for the petition.
Casual - Wrong: My dog chase squirrels in the yard every morning.
Casual - Right: My dog chases squirrels in the yard every morning.
Casual - Wrong: She always chase drama at parties.
Casual - Right: She always chases drama at parties.
Casual - Wrong: That guy chase every trend he sees online.
Casual - Right: That guy chases every trend he sees online.
Wrong: The bus pass at noon.
Right: The bus passes at noon.

Try your own sentence

Test the whole sentence, not just a phrase. Context often reveals the correct form.

Memory trick and editing shortcuts

Three quick habits to use while editing: substitution, read-aloud, and a fast visual scan.

Substitute he/she/it: if substitution works, add -s (The dog → He chases).
Read aloud: missing endings jump out when spoken.
3-second scan: find the subject, then check the verb immediately after any phrases.

Tip: Turn a problem phrase into a short rewrite: "manager chase" → say "He chases" and apply the same form.

Real usage and tone: when omitting -s is intentional

Omitting -s can be a stylistic choice in headlines, captions, or to represent dialect in dialogue. These are deliberate exceptions, not standard sentence grammar.

Headline style: "Dog chase man" is acceptable as a headline but not in formal prose.
Dialogue: drop -s to capture authentic voice, but use this sparingly.
Formal writing (reports, essays, contracts) should always use standard -s forms.

Similar mistakes, auxiliaries and grammar notes

Agreement errors can involve auxiliaries, existential there, quantifiers, or collective nouns. Check the whole construction, not just the main verb.

Auxiliaries/modals: After do/does/did or modals, the main verb stays in base form (He does not chase, not He does not chases).
Existential there: Match is/are to the following noun (There are several options).
Collective nouns: Style guides differ - American guides often treat "team" as singular (The team chases); some British usage treats it as plural.

Wrong: He does not chases the problem.
Right: He does not chase the problem.
Wrong: There is several reasons to choose C.
Right: There are several reasons to choose C.
Wrong: The committee chase the proposal (if following a plural reading).
Right: The committee chases the proposal (if treating the committee as a single unit).

Hyphens, punctuation and spacing notes

Hyphenation, possessives, and extra spaces don't change whether a subject is singular or plural. Fix agreement first; then tidy punctuation and spacing.

Hyphen example: The well-trained dog chases - the hyphen doesn't change the verb.
Possessive vs plural: The dog's toy vs The dogs chase - confirm meaning before changing the verb.
Spacing: Extra spaces don't excuse a missing -s; correct the verb, then format.

Wrong: The well trained dog chase the ball.
Right: The well-trained dog chases the ball.
Wrong: The dogs chase the cat. (double space)
Right: The dogs chase the cat.

FAQ

Is "The dog chase" ever correct?

Only in nonstandard dialects or compressed headline style. In standard sentences use "The dog chases."

How do I check agreement fast?

Find the grammatical subject, substitute he/she/it, and if it fits change the verb to -s/-es/-ies. Reading aloud helps.

What about verbs after will/should/can?

Modals use the base verb: He will chase, she can fix. Do not add -s after modal verbs.

Do collective nouns take -s or not?

Style guides differ. In American English many collective nouns are singular (The team chases). In some British usage they can be plural (The team chase). Follow your style guide or the intended tone.

How do verbs ending in -y or -ch change?

Consonant + y → replace y with -ies (try → tries). Verbs ending in -ch, -sh, -s, -x, -z add -es (watch → watches).

Want a quick sentence check?

Use the substitution trick (he/she/it), read the sentence aloud, and apply the checklist (find subject → substitute → add -s if needed). Keep a short reference of add -s, -es, -ies near your keyboard until it becomes automatic.