-S and -ES Pronunciation: /s/, /z/ or /ɪz/? Rules & Drills

You know the grammar: one cat, two cats; I work, she works. Yet in speech the ending often disappears, comes out as the wrong sound, or turns into a heavy extra syllable that nobody expects. -S and -ES pronunciation follows one simple rule, and it is not the rule most textbooks teach. The ending has three sounds, /s/, /z/ and /ɪz/, and the choice depends on the last sound of the word, not the last letter. If you have already worked through our guide to ED pronunciation and the /t/, /d/, /ɪd/ rules, you will recognise the logic immediately: -ed in the past, -s in the present, and the same voicing test decides both.

This guide covers the rule, the spelling traps that fool even advanced learners, the four grammar jobs the ending does, how it links into the next word, and a shadowing routine that makes the right sound automatic.

Why the -S Ending Matters in Speech

The little -s carries a lot of grammar. It tells the listener:

• more than one (plural): two cats, three boxes
• he, she or it does this regularly (third person present simple): she works, he goes, it washes
• belongs to (possessive): Mike's phone, the boss's office
• is / has (contraction): it's late, he's gone, what's this?

Drop it and the listener has to guess. My friend live in Leeds sounds like a grammar mistake even if you know the rule perfectly. Get the voicing wrong and you can change the word itself, because /s/ and /z/ separate many English minimal pairs:

• price /praɪs/ vs prize /praɪz/
• rice vs rise, bus vs buzz, ice vs eyes, peace vs peas
• cap vs caps, cab vs cabs: the ending is the only clue to "how many"

-S and -ES Pronunciation: The One Rule

Say the word without the ending. Listen to its final sound and feel your throat. Put two fingers on your neck and say "ssss", then "zzzz". The first is silent under your fingers; the second buzzes. That buzz is voicing, and it decides everything.

/s/ after voiceless sounds

If the word ends in a voiceless sound, /p/, /t/, /k/, /f/ or /θ/, the ending is a quiet /s/.

• cats /kæts/, stops /stɒps/, books /bʊks/
• laughs /lɑːfs/, months /mʌnθs/, works /wɜːks/

/z/ after voiced sounds and all vowels

If the word ends in a voiced consonant (/b/, /d/, /g/, /v/, /ð/, /m/, /n/, /ŋ/, /l/, /r/) or any vowel, the ending is a buzzing /z/.

• dogs /dɒɡz/, loves /lʌvz/, reads /riːdz/
• plays /pleɪz/, goes /ɡəʊz/, trees /triːz/, calls /kɔːlz/

This is the group learners get wrong most often. Because the letter is s, they say /s/: "dogss", "playss". In fact /z/ is the most common pronunciation of the ending in everyday English, simply because so many words end in vowels and voiced sounds.

/ɪz/ after hissing and hushing sounds

If the word already ends in a sibilant, /s/, /z/, /ʃ/, /ʒ/, /tʃ/ or /dʒ/, English adds a small vowel so you can hear the ending at all. This is the only case where the ending adds a syllable.

• buses /ˈbʌsɪz/, boxes /ˈbɒksɪz/, roses /ˈrəʊzɪz/
• wishes /ˈwɪʃɪz/, watches /ˈwɒtʃɪz/, judges /ˈdʒʌdʒɪz/, garages /ˈɡærɑːʒɪz/

The vowel is short and weak, closer to a relaxed schwa than a clear "ee" or "eh". Say watches like "WOTCH-iz", never "wotch-EZ".

Last sound of the base word	Ending	Examples
Voiceless: /p t k f θ/	/s/	cups, hats, walks, cliffs, myths
Voiced consonants + all vowels	/z/	jobs, bags, lives, songs, sees, plays
Sibilants: /s z ʃ ʒ tʃ dʒ/	/ɪz/	kisses, sizes, dishes, beaches, pages

If you want to train the two target sounds on their own first, the IPA lesson on /s/ and /z/ has audio for each one and short word drills.

Spelling Traps: Trust Your Ear, Not the Letters

English spelling hides the real final sound, so the "letter rule" you may have learned at school (-es after s, x, ch, sh) only works half the time. Watch for these:

• -gh that sounds like /f/: laughs, coughs and graphs take /s/.
• Silent -e words: house ends in /s/, so houses is /ˈhaʊzɪz/ (and notice the /s/ of the stem turns into /z/ too). Pages, places, prices, noses, changes all get /ɪz/ even though you only add the letter s.
• -x is two sounds, /ks/: so fixes and boxes end in /ɪz/.
• -th can be either: months and myths (voiceless /θ/) take /s/; clothes (voiced /ð/) takes /z/, and in fast speech it often sounds just like close.
• Vowel changes: says is /sez/, not "sayz"; does is /dʌz/, not "dooz". Learn these two as whole words.

Clusters at the end of a word can feel like a mouthful: tests /tests/, costs, texts /teksts/, sixths /sɪksθs/. Do not break them with a vowel ("test-es"). Build them from the back: s → ts → sts → tests. If the /θ/ in months is still a struggle, our step-by-step guide to the TH sound and its clusters will help.

Plurals, He/She Verbs, Possessives and Contractions

The good news: the same rule covers all four grammar jobs. You do not need four systems.

• Plural: maps /s/, bags /z/, classes /ɪz/.
• Third person present: he works /s/, she goes /z/, it washes /ɪz/. The irregular has /hæz/ ends in /z/.
• Possessive: Mike's /maɪks/, Anna's /ˈænəz/, the boss's /ˈbɒsɪz/, George's /ˈdʒɔːdʒɪz/. Plural possessives like the students' sound exactly the same as students.
• Contractions of is/has: it's /ɪts/ and what's /wɒts/ get /s/ because they follow /t/; he's, she's, there's and John's here get /z/.

The Most Common -S Mistakes

1. Dropping the ending. Many languages do not have final /s/ or /z/, or they do not mark plural with a sound. The result is "two book", "she like". Fix it by slightly over-pronouncing the ending for two weeks, then relaxing it.
2. Devoicing /z/ to /s/. Speakers of German, Dutch, Russian, Turkish and Spanish often say dogs as "docks". Lengthen the vowel before a voiced ending: dogs has a longer /ɒ/ than docks, and that length is half of what the listener hears.
3. Adding a vowel everywhere. "Cat-es", "book-es", "dog-uz". Only sibilants get an extra syllable. Works, plays and stops stay one syllable.
4. Saying "-es" as a strong /ez/. The /ɪz/ syllable is unstressed. A heavy "EZ" breaks the rhythm.
5. Forgetting /ɪz/ after silent -e. Pages said as one syllable sounds like "paige-z" and is hard to understand.

Drills: say each line three times

• /s/: He works, sleeps, and laughs.
• /z/: She loves dogs, plays games, and reads books. (careful: books is /s/)
• /ɪz/: She watches the news, washes the dishes, and fixes the boxes.
• Mixed: It's Mike's turn, but the boss's car is in the garage.
• Pairs: price / prize, rice / rise, ice / eyes, place / plays, bus / buzz.

For more short warm-ups in the same style, browse our pronunciation practice exercises.

Linking: the Ending Glues to the Next Word

In real speech the ending rarely sits alone. When the next word starts with a vowel, the /s/ or /z/ moves across and becomes the first sound of that word, exactly like the other patterns in English connected speech:

• He likes it → "he like-sit"
• She goes out → "she goe-zout"
• It washes up → "it washe-zup"
• What's on? → "what-son"

Linking is good news. A final /z/ that is hard to say at the end of a phrase becomes easy when it starts the next syllable. Before a consonant (she plays tennis), keep the ending short but present; do not let it vanish.

A 10-Minute Shadowing Routine for -S Endings

Shadowing means repeating a speaker almost at the same time as you hear them, copying sounds and rhythm together. For the -s ending, the best material is anything in the present simple about daily life: he gets up, takes the bus, goes to work, has lunch. Daily routines and habits are packed with third-person verbs and plurals.

1. Listen once (1 min). Start slow, with something like an A1 talk about a normal day. Do not repeat yet; just notice every -s.
2. Mark the endings (2 min). In the transcript, write s, z or iz above each ending. This is where the rule becomes a habit.
3. Shadow slowly (3 min). Replay sentence by sentence at a reduced speed. Exaggerate the /z/ buzz on the first pass.
4. Record and compare (2 min). Record one sentence, play it next to the original, and check: is every ending there? Is goes buzzing, not hissing?
5. Speed up (2 min). Return to normal speed and focus on linking (gets up → "get-sup").

When that feels easy, move to a beginner A1–A2 story about one man's daily routine, then to a natural dialogue like this conversation about daily habits. For a reading-and-listening break, the short story Mia's Busy Day is written almost entirely in the present simple. You can find more material on the A2 practice videos page and in the daily conversation collection.

Self-Check Before You Move On

• Do works, plays and stops stay one syllable?
• Does your throat buzz on dogs, goes and he's?
• Do only sibilant words (buses, watches, pages) get the extra /ɪz/?
• Are says /sez/ and does /dʌz/ correct?
• Can a listener hear the difference between price and prize when you say them?
• Does the ending link forward before a vowel (she goes out)?

Practise -S Endings With AI Feedback

The hardest part of fixing -s is that your own ear tends to fill in an ending you did not actually say. On ShadowingEnglish you shadow daily-life videos sentence by sentence, replay any sentence and slow it down, then record yourself and get AI pronunciation scoring with a per-sound analysis, so a missing or devoiced final /z/ shows up on the exact word. Tap any word to see its IPA and hear it, and switch to dictation mode on the same video to check whether you can hear the endings, not just say them. Start free: pick a daily-routine video today and make she goes buzz by the end of the week.