Pronouncing -s endings
The -s ending on plurals and third-person verbs is pronounced three ways. After a hissing or buzzing sound — s, z, sh, zh, ch or j — it adds a syllable and is said /ɪz/, as in buses and watches. After any other voiceless sound it is said /s/, as in cats and books. After any other voiced sound or a vowel it is said /z/, as in dogs and boys. English speakers apply this without thinking, which is why the written s misleads learners.
The rule in one line
Look at the sound before the -s. If it hisses or buzzes, the ending becomes a syllable of its own. Otherwise it matches that sound's voicing: voiceless takes /s/, voiced takes /z/. It is the same logic as -ed endings, applied to a different ending.
1. /ɪz/ — after a hissing or buzzing sound
After s, z, sh, zh, ch or j the ending has to become its own syllable, because two hissing sounds cannot run together. has one syllable; has two.
2. /s/ — after a voiceless sound
After p, t, k, f or a voiceless th. No extra syllable.
3. /z/ — after a voiced sound or a vowel
Everything else, which is most words. This is why the written s so often sounds like a z — ends in a buzz, not a hiss.
It is the same rule three times over
This one pattern covers plural nouns (), third-person verbs (), possessives (Rita's) and contractions (it's). Learn it once and four pieces of grammar stop being a pronunciation problem.
The plurals that ignore it
Some nouns ending in a voiceless th or f switch to voiced before the plural s, changing the stem sound rather than just adding one.
And a handful take no s at all: , , , , .
Practise this
Show the 15 words
Show the 15 words
Show the 15 words
Show the 15 words
Quick pronunciation tips
Read slowly first. Pronounce each syllable deliberately before trying to blend them at full speed. Rushing hides the vowel and consonant shapes your ear needs to learn.
Record yourself. Most phones have a voice memo app — record a word, then compare it to the playback here. Hearing the gap between your version and the model accent makes targeted practice far easier.
Focus on one accent. Jumping between American, British and Australian in the same session creates confusion. Pick the accent you encounter most and stick with it until the patterns feel natural.
Keep going
Every word above is a button. Set the accent and voice you want on the main screen, then come back — the guides use whatever you chose. To hear two accents against each other, use Compare; to test whether you can actually hear a contrast, use the listening quiz.
Sources and review
Last reviewed 2026-09-22 · Learn Pronounce