it strong form BrE AmE ɪt —There is no distinct weak form in Received Pronunciation, but in some other varieties, including most General American, there is a weak form §ət . —The phrases it is, it isn't are often syllabified irregularly, as ɪ ˈtɪz, ɪ ˈtɪz ə nt.
IT
Meaning of IT in English
Longman Pronunciation English Dictionary. Английский словарь произношений Longman. 2012