My name is Megan Brach. I've been teaching English as a second language for 4 years. Learning English is'nt fast, nor is it easy, but I'm gonna help you get started. Are you ready? Let's learn English! Now let's go through the difference between the "Sh" sound and the "Ch" sound. Put your teeth together, and aspirate. The difference is, for this sound you don't use your vocal chords. So let's practice; Shh-are,chef, crash. Now, your mouth shape is the same, but your going to use your vocal chords; Cha-Cha-Cha. So let's practice; Chair, much, cheese, choose. Now you know the difference between the "Shh-Shh" sound and the "Cha-Cha" sound.