it certainly will help
it certain will help
pro:per adv mod n
it certainly will help.
ɪ t WORD_BOUNDARY s ɜː t ə n l i WORD_BOUNDARY w ɪ l WORD_BOUNDARY h ɛ l p WORD_BOUNDARY
i t WORD_BOUNDARY c e r t a i n l y WORD_BOUNDARY w i l l WORD_BOUNDARY h e l p . WORD_BOUNDARY