At the end of a word, ’s’ has two possible pronunciations: /s/ or /z/.
1. After the following sounds we pronounce ‘s’ as /s/:
after a /p/ sound:
2 shops /s/
after a /t/ sound:
2 hats /s/
after a /k/ sound:
2 books /s/
after a /θ/ sound:
2 cloths /s/
after a /f/sound:
2 giraffes /s/.
2. In all other cases we pronounce ‘s’ as /z/: