How To Pronounce “is”

“is” is a function word, so it has more than one pronunciation. In normal connected speech the weak form is usual. The strong form is used when the word is stressed, said on its own or at the end of a phrase.

Strong form. In British English it is /ɪz/, and in American English it is /ɪz/. It is used in isolation, at the end of speech, or for emphasis or contrast.

Weak form, after a voiced sound. In British English it is /z/, and in American English it is /z/. It is used in connected speech, after a vowel or a voiced consonant.

Weak form, after a voiceless sound. In British English it is /s/, and in American English it is /s/. It is used in connected speech, after a voiceless consonant.

Slashes / / show the phonemic transcription, the sounds that change meaning. Square brackets [ ] show the phonetic transcription, with the finer detail of how the sounds are actually made.