It is also used in the negative when no other auxiliary verbs are used.
ɪ t WORD_BOUNDARY ɪ z WORD_BOUNDARY ɔ l s oʊ WORD_BOUNDARY j uː z d WORD_BOUNDARY ɪ n ð ə WORD_BOUNDARY n ɛ ɡ ə t ɪ v WORD_BOUNDARY w ɛ n WORD_BOUNDARY n oʊ WORD_BOUNDARY ʌ ð ə ɹ ɹ WORD_BOUNDARY ɔ k s ɪ l iə ɹ i WORD_BOUNDARY v ɜː b z WORD_BOUNDARY ɑ ɹ WORD_BOUNDARY j uː z d WORD_BOUNDARY