How to Pronounce the /f/ Sound

/f/ is a consonant in the English language.

As you can see, in picture (a), to produce this sound, we use both our upper teeth and our lower lip. As you can see more clearly in picture (b), we move the inside of the lower lip under the upper teeth. Note that we do not bite our lips. It is just a simple grip. If you bite your lip, the air comes out from the corners of your mouth which is wrong. The air must come out slowly from between the upper front teeth and the lower lip. As you can see, in picture (b), the uvula has blocked the air from going through the nose. The /f/ sound is voiceless. Therefore, there is no vocal chord vibration. As it is visible, the circle signifying the vocal cords in the throat remains grey.
In picture (c), we can see that the tongue does not make contact with any parts of the mouth. It is appropriate to say that the tongue does not participate in the production of this sound.
The /f/ sound is represented by the letters below:

As you can see, in the table below, most of the common languages in the world have the /f/ sound. Some languages like Japanese, Marathi, and Korean do not have it. With the instructions provided and a little bit of practice, you can easily learn to produce this sound. Look:

Below, there is an audio file that helps you learn the proper pronunciation of the /f/ sound: