/f/ /v/ Strong Unvoiced Does not lengthen vowel in front Weak Voiced
/f/ off /v/ of
/f/ off fan /v/ of van
/f/ off fan life /v/ of van live (adj.)
/f/ off fan life leaf /v/ of van live (adj.) leave
/f/ off fan life . leaf rifle (a kind of gun) /v/ of van live (adj.) leave rival (someone who competes against you)
/f/ off fan live (adj.) leaf rifle (a kind of gun) safe /v/ of van life leave rival (sb who competes against you) save
/v/ veal /w/ wheel
/v/ veal vent (an opening to let air circulate) /w/ wheel went
/v/ veal vent (an opening to let air circulate) vest /w/ wheel went west
fail vanish enough very dive cough off of have faint laugh save
/f/ fail enough cough off faint laugh
/v/ vanish very dive of have save