22. The j, q, x vs. zh, ch, sh sounds
Native English speakers often have trouble distinguishing
between these sounds. For instance, 'x' and 'sh' sound
similar to native English ears, but to native Chinese
speakers, the sounds are completely different. The
tongue and lip positions are very different. For 'sh', the tip
of the tongue should be on the roof of the mouth, and 'x'
the tip of the tongue should be behind the lower teeth.