# 2.2.10. `tʃ/dʒ`

`ʃ/ʒ` 发声时舌尖贴近但没有接触到龈脊，`tʃ/dʒ` 则需要舌尖贴到龈脊，和 `t/d` 一样；但，无论是 `ʃ/ʒ` 还是 `tʃ/dʒ` 发声时舌背都抬得较高，舍尾抵到后牙。

When pronouncing `ʃ/ʒ`, the tip of your tongue should be close to, but not touching, the alveolar ridge. For `tʃ/dʒ`, however, you need to touch the alveolar ridge with your tongue tip, same as when pronouncing `t/d`. However, when pronouncing either the sounds `ʃ/ʒ` or `tʃ/dʒ`, the tongue roof should arch higher in the mouth, with the back of it touching back teeth.

![articulator-tongue-tip-td](/images/articulator-tongue-tip-chzh.svg)

为了让舌尖适应那个部位，不妨反复练习：

To get your tongue used to this position, it's a good idea to practice repeatedly:

> * `ʃ... tʃ... ʃ... tʃ... ʃ... tʃ... ʃ... tʃ... ʃ... tʃ...`
> * `ʒ... dʒ... ʒ... dʒ... ʒ... dʒ... ʒ... dʒ... ʒ... dʒ...`
> * `ʃ... ʒ... ʃ... ʒ... ʃ... ʒ... ʃ... ʒ... ʃ... ʒ...`
> * `tʃ... dʒ... tʃ... dʒ... tʃ... dʒ... tʃ... dʒ... tʃ... dʒ...`