The tip of your tongue is retracted –it’s up high on your ‘Alveolar Ridge’ as is a vowel sounded before an L:Police or
You put it on the forward march so it’s against the back of the teeth. Now, the root of the tongue –the soft palate or velum is approaching as is a vowel sounded after an L:Play.
Rehearsals with words using the terms:
Available here for practice with videos like
If you like these Buy My Time.