The /v/ sound is made by touching the top teeth with the bottom lip, then releasing air through the mouth. If you touch your throat while making this sound, you should feel the vibration coming from your vocal chords. This is called a voiced sound. Notice the difference between the next two words: vase, base. Now you try
The /b/ sound is made by bringing your upper and lower lips together. This sound is also voiced.
The very big violin vanished.
That is a very big berry.
Listen, record and practice
Record your voice, then click Stop when you finished