Let's practice

Practice the voiceless S sound

Practice the voiceless S sound by saying these words:

Now practice the voiced Z sound

Now, let's practice the voiced Z sound. Remember, your vocal cords should vibrate when you make this sound because it is a voiced sound.

Finally, practice the sounds side-by-side

Remember to voice the Z sound and use only air for the S sound!

Z | S
is
| its
exist | fox
zag | sag
boys | cats
Tuesday | Sunday


Challenge words!

These are more challenging words. Some of these words even have both sounds! Practice them slowly.

Remember to practice these two sounds together, so you can learn their differences! Practice them slowly to hear how they sound. 
来自：https://www.really-learn-english.com/