They can be pressed together (when we produce the sounds p , b ), brought into contact with the teeth (as in f , v), or rounded to produce the lip-shape for vowels like uù.
Explanation:
The tongue is in contact with the upper side teeth for many speech sounds. Sounds made with the tongue touching the front teeth are called dental.
Un mec seul travaille et essaie de survivre jour après jour This is the translation of "<span>Single guy just working and trying to survive day in and day out</span>" into french