The He/She/It Rule: Adding -s and -es to Verbs
Grammar Rule in 30 Seconds
In the Present Simple, always add an -s or -es to the verb when the subject is He, She, or It.
- Add -s to most verbs: He walks, She plays, It works.
- Add -es to verbs ending in -ch, -sh, -s, -x, or -z: She watches, He fixes.
- Change -y to -ies if there is a consonant before it: It flies, She studies.
Overview
-s. Do not add -s for I. Do not add -s for you. Use it for he, she, or it. This small letter is very important. It shows that one person is doing an action. It shows a habit or a fact. This is a main rule in English.Conjugation Table
| Subject | Verb: to work |
Verb: to watch |
Verb: to study |
||
|---|---|---|---|---|---|
| :--- | :--- | :--- | :--- | ||
| I | work | watch | study | ||
| You | work | watch | study | ||
| He | works | watches | studies | ||
| She | works | watches | studies | ||
| It | works | watches | studies | ||
| We | work | watch | study | ||
| They | work | watch | study |
How This Grammar Works
- Talking about others: You are talking *about* someone. They are not the speaker. They are not the listener. Examples:
he,she,it,they. - Only one: This means there is only one person or thing. We only look at
he,she, andit.
he or she. Use it for any single person or thing:- One person:
The teacher explains the lesson.(The teacher =heorshe) - A name:
David runs a small business.(David =he) - One thing:
Water freezes at 0°C.(Water =it) - Special words: Some words mean "every person" but act like one.
Everyone needs to sign in.Nobody likes to be late.
-s helps the listener. It shows one person is doing the action now.
Formation Pattern
-s
-s.
work → He works in an office.
live → She lives near the park.
see → It seems like a good idea.
-s, -ss, -sh, -ch, -x, -z, -o: Add -es
-s. We add -es to make it easier.
miss → He misses his family.
wash → She washes the dishes.
watch → He watches the news at six.
fix → The mechanic fixes cars.
go → The bus goes to the city.
do → She does her best.
-y: Change -y to -i and Add -es
-y. If it is not a, e, i, o, u, change it.
study → She studies biology. (d is the letter before)
try → He tries very hard. (r is the letter before)
fly → A bird flies in the sky. (l is the letter before)
-y: Just Add -s
-y is a, e, i, o, u, do not change it.
play → He plays the guitar. (a is the letter before)
enjoy → She enjoys reading. (o is the letter before)
say → He says hello. (a is the letter before)
have is different. It does not become haves.
have → has. She has two brothers.
be is also different.
be → is. He is happy.
When To Use It
- Habits and Routines: Things that happen often.
My father reads the paper every morning.She checks her email every day.The cafe opens at 7 AM.
- Facts: Things that are always true.
The Earth rotates around the sun.A cheetah runs very fast.Honesty matters.
- Permanent Situations: Long-term things or feelings.
He works as a teacher.She believes you.This painting looks beautiful.
- Schedules: For trains, planes, or plans.
The train departs at 5:00 PM.Her flight arrives tomorrow morning.The school year ends in June.
When Not To Use It
-s. This is very important.- With Other People: Do not use
-sforI,you,we, orthey. I speak English.(NotI speaks)You understand the lesson.(NotYou understands)The managers agree on the plan.(Managers =they)
- In Questions and "No" Sentences: We use a helper word like
does.Doesalready has the-ssound. Use the simple verb here. Does she live here?(Correct)He doesn't want coffee.(Correct)Why does the baby cry?(Correct)
- With Special Verbs: Words like
can,will, andshouldnever change. She can run very fast.(NotShe can runs)He should call his parents.(NotHe should calls)The machine might break.(NotThe machine might breaks)
- In Other Times: Only use this rule for the present.
- Now:
She is talking. - Past:
He waited. - Future:
It will rain.
2. Negative Contractions
| Full Form | Contraction | Usage |
|---|---|---|
|
He does not
|
He doesn't
|
Very common
|
|
She does not
|
She doesn't
|
Very common
|
|
It does not
|
It doesn't
|
Very common
|
Present Simple Conjugation of 'To Work'
| Subject | Verb Form | Rule Applied |
|---|---|---|
|
I
|
work
|
Base form
|
|
You
|
work
|
Base form
|
|
He
|
works
|
Add -s
|
|
She
|
works
|
Add -s
|
|
It
|
works
|
Add -s
|
|
We
|
work
|
Base form
|
|
They
|
work
|
Base form
|
Meanings
The rule used to conjugate verbs in the present simple tense when the subject is a third-person singular pronoun or a singular noun.
Habits and Routines
Used to describe things that happen regularly or as a schedule.
“He drinks coffee every morning.”
“She goes to the gym on Tuesdays.”
General Truths
Used for facts that are always true.
“The sun rises in the east.”
“Water freezes at zero degrees.”
Permanent States
Used for things that stay the same for a long time.
“My brother lives in London.”
“She works for a big tech company.”
Reference Table
| Form | Structure | Example |
|---|---|---|
|
Affirmative
|
Subject + Verb(-s/es)
|
He speaks English.
|
|
Negative
|
Subject + doesn't + Verb (base)
|
She doesn't speak French.
|
|
Question
|
Does + Subject + Verb (base)?
|
Does it work?
|
|
Short Answer (+)
|
Yes, Subject + does
|
Yes, he does.
|
|
Short Answer (-)
|
No, Subject + doesn't
|
No, she doesn't.
|
|
Wh- Question
|
Wh- + does + Subject + Verb?
|
Where does he live?
|
Formality Spectrum
He serves as the Chief Executive Officer. (Professional)
He works as a manager. (Professional)
He's a boss. (Professional)
He runs the show. (Professional)
The 'S' Club
Pronouns
- He He sings
- She She sings
- It It sings
Nouns
- John John sings
- The bird The bird sings
Verb vs. Noun -s
Spelling Decision Tree
Does it end in -ch, -sh, -s, -x?
Does it end in Consonant + Y?
Irregular Third Person
Common Irregulars
- • Has (from Have)
- • Goes (from Go)
- • Does (from Do)
Examples by Level
He plays football.
She drinks milk.
It rains a lot.
My dad cooks dinner.
She doesn't like apples.
Does he work here?
The bus stops near my house.
He studies English every day.
The company provides free lunch.
He always carries a heavy bag.
She rarely misses a deadline.
It seems like a good idea.
The theory suggests that time is relative.
He maintains his innocence despite the evidence.
The government denies any involvement.
She possesses a unique talent for music.
The author argues that society is changing.
Each of the participants receives a certificate.
The success of the project depends on teamwork.
He seldom expresses his true feelings.
One finds that the data contradicts the hypothesis.
The law stipulates that all citizens must pay taxes.
The protagonist's journey symbolizes human growth.
The economy fluctuates based on global trends.
Easily Confused
Both use an 's', but for opposite reasons. Nouns use 's' to show there are many; verbs use 's' to show there is only one subject.
Learners often use 'is' with the -s verb, which is incorrect.
Modal verbs are special and NEVER take an -s, even for He/She/It.
Common Mistakes
He play football.
He plays football.
She haves a dog.
She has a dog.
It rain today.
It rains today.
My friend like pizza.
My friend likes pizza.
He doesn't likes pizza.
He doesn't like pizza.
Does she goes to school?
Does she go to school?
He studys hard.
He studies hard.
The people likes the movie.
The people like the movie.
Everyone have a dream.
Everyone has a dream.
The news are bad.
The news is bad.
The data shows that...
The data show that...
Sentence Patterns
He ___ (verb) every day.
She doesn't ___ (verb) because ___.
Does he ___ (verb) at ___ (time)?
It ___ (verb) like a ___ (noun).
Real World Usage
He says he's coming at 8.
My current boss relies on my reports.
She looks so cute in this photo!
My friend wants the burger, please.
The flight departs from Gate 4.
The liquid reacts with the metal.
The 'Does' Rule
Don't over-S
Listen for the Buzz
Names count too
Smart Tips
Think of 'doesn't' as a thief. It steals the 's' from the verb and keeps it for itself!
Look at the letter BEFORE the 'y'. If it's a, e, i, o, u, just add 's'. If not, change it to 'ies'.
In American English, treat the group as 'It' (singular). In British English, you can often use either singular or plural.
Always use the -s. These words feel plural but they are grammatically singular.
Pronunciation
The /s/ sound
Use /s/ after voiceless sounds like p, t, k, f.
The /z/ sound
Use /z/ after voiced sounds like b, d, g, v, l, m, n, r and vowels.
The /ɪz/ sound
Use /ɪz/ after hissing sounds (s, z, sh, ch, x). This adds an extra syllable.
Declarative Stress
He WORKS in a BANK.
Standard emphasis on the verb and the object.
Memorize It
Mnemonic
He, She, It, the 'S' must fit!
Visual Association
Imagine a snake (shaped like an S) following a boy, a girl, and a robot wherever they go. The snake is their pet that only likes them, not 'I' or 'You'.
Rhyme
He, She, It, and singular nouns, Wear the 'S' like golden crowns.
Story
The letter 'S' is a very shy letter. It is too scared to talk to 'I', 'You', 'We', or 'They'. But it feels very safe with 'He', 'She', and 'It'. Whenever they do an action, 'S' jumps onto the end of the word to join the fun.
Word Web
Challenge
Look around the room. Find one person or one object. Say three things they do using the -s rule. (e.g., 'The clock ticks. My brother sleeps. The fan turns.')
Cultural Notes
The -s is strictly required in formal writing and professional speech. Omitting it can be seen as a sign of low education or non-native status.
In AAVE, the third-person -s is often omitted. This is a systematic grammatical feature of the dialect, not a 'mistake' within that context.
In international business where neither speaker is native, the -s is often dropped without loss of meaning. However, for exams like IELTS/TOEFL, it is mandatory.
The -s ending comes from the Northumbrian dialect of Old English, where it was -es.
Conversation Starters
What does your best friend do for fun?
Tell me about your pet's daily routine.
How does your favorite celebrity spend their time?
Describe how a machine in your house works.
Journal Prompts
Common Mistakes
Test Yourself
He ___ (work) in an office.
Which sentence is correct?
Find and fix the mistake:
My brother study Spanish on Mondays.
watch / he / TV / every / night
She ___ to the park.
Match each item on the left with its pair on the right:
We add -s to the verb when the subject is 'You'.
A: Does your sister live here? B: No, she ___ in London.
Score: /8
Practice Exercises
8 exercisesHe ___ (work) in an office.
Which sentence is correct?
Find and fix the mistake:
My brother study Spanish on Mondays.
watch / he / TV / every / night
She ___ to the park.
1. I / 2. She / 3. They
We add -s to the verb when the subject is 'You'.
A: Does your sister live here? B: No, she ___ in London.
Score: /8
Practice Bank
10 exercisesHe ___ to the gym at 6 PM.
The plane fly high in the sky.
every / He / Netflix / night / watches
Ella tiene un gato.
My phone ___ a lot of battery.
Match the following:
The sun ___ (shine) brightly today.
Does he likes pizza?
always / She / her / finishes / work
He ___ to learn.
Score: /10
FAQ (8)
The verb `have` is irregular. Over hundreds of years, the 'v' sound was dropped in the third person to make it easier to say. So, `has` is just a shorter, irregular version of `haves`.
No! Modal verbs like `can`, `will`, `should`, and `must` never take an -s. You say `He can swim`, not `He cans swim`.
Uncountable nouns like `water`, `money`, or `sugar` are treated as `It`. So you add the -s: `The water boils at 100 degrees.`
It is `flies`. Because `fly` ends in a consonant (l) + y, you must change the `y` to `i` and add `es`.
In some dialects or very casual speech, people might drop the -s. However, in standard English and all formal situations, it is considered a mistake.
No. In the past tense, the verb form is usually the same for all people (e.g., `I worked`, `He worked`). This rule is only for the Present Simple.
If you use 'singular they' (when you don't know the gender or someone prefers it), you do NOT add the -s. You say `They work here`, even if you mean one person.
Practice 'shadowing' native speakers. When you hear a 'He' or 'She', listen for that 's' sound at the end of the next word. It takes time to become a habit!
Scaffolded Practice
1
2
3
4
Mastery Progress
Needs Practice
Improving
Strong
Mastered
In Other Languages
Conjugación de la tercera persona (-a, -e)
English only has one special ending (-s), while Spanish has six.
Troisième personne du singulier
The English -s is always pronounced, whereas French endings are often silent.
Dritte Person Singular (-t)
German also changes the verb for 'you' and 'we', which English doesn't do.
None
Japanese speakers must learn to add a sound that doesn't exist in their grammar logic.
Al-mudaari' (Present tense prefixes)
Arabic distinguishes between 'he' and 'she' in the verb form, while English uses -s for both.
None
English grammar requires a physical change to the word, which is a new concept for Chinese speakers.
Learning Path
Prerequisites
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