The pronunciation of the third person singular -s ending in English verbs can be /s/, /z/ or /ɪz/, depending on the preceding sound.
- /s/: after voiceless sounds (except /s, ʃ, tʃ/)
- /z/: after voiced sounds (except /z, ʒ, dʒ/) and vowels
- /ɪz/: after /s, z, ʃ, ʒ, tʃ, dʒ/