| 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. |
| /i/ | The tongue is tense and rises high. Then it moves to the front of the mouth. The tip of the tongue is low and behind the bottom front teeth. | The lips are tense and wide. | The jaw drops, opening the mouth a little. | | | The vocal cords vibrate. |
| /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. |
| /t/ | The tongue will come up. The front part will touch the roof of the mouth behind the top teeth. Then it will pull down to release the air. | | | The teeth are together. Then they separate. | Air passes through the mouth. First, the air stops. Then, it flows. | The vocal cords do not vibrate. |
| /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. |
