The sounds /f/ and /v/ are formed by pressing the lower lip against the upper teeth and allowing the air to force its way between them and through the interstices of the teeth, the soft palate being in its raised position. See to it that 'voice' is produced during the articulation of /v/.
Let's practice the following pairs: fat-vat, fain-vain, fine-vine, fast-vast, safe-save, fife-five, proof-prove, strife-strive calf-calves, knife-knives.
Let's practice the following words:
thaw, thank, thud, thick; that, this, they, these; thought-though, bath-bathe, breath-breathe, cloth-clothe, mouth-month (v), tooth-soothe.
