| Sound | Tongue | Lips | Jaw | Teeth | Air | Vocal Chords |
|---|
| /ˈ/ | | | | | | |
| /f/ | | The bottom lips are in contact with the teeth. | | The top teeth press the bottom lips. | The air flows through the teeth. | The vocal cords do not vibrate. |
| /ɪ/ | The tongue raises high in the mouth. It moves to the front of the mouth. Then the tip of the tongue moves behind the bottom front teeth. The tongue remains relaxed in the front of the mouth. | The lips separated and relaxed. | The jaw drops and the mouth opens a little bit. | | | The vocal cords vibrate. |
| /f/ | | The bottom lips are in contact with the teeth. | | The top teeth press the bottom lips. | The air flows through the teeth. | The vocal cords do not vibrate. |
| /θ/ | Place the tip of your tongue behind your top front teeth, touching the inside edge of your upper incisors. | Keep your lips relaxed and slightly parted. | Keep your jaw slightly open and relaxed. | Keep your top and bottom teeth slightly apart. | Push a stream of air out through your mouth, over the top of your tongue. | Do not use your vocal cords to produce this sound. It is a voiceless consonant. |
| /s/ | The tongue is behind the teeth. | | | The teeth remain clenched. | The air flows through the tip of the tongue towards the edge of the teeth. | The vocal cords do not vibrate. |
