What is the schaw sound in word sentence?

There's no "schaw" sound in English. It's likely you're thinking of a different sound or a word that is spelled differently.

Could you please provide more context? For example:

* What word were you thinking of?

* What is the sentence you're trying to write?

* Can you give me an example of how the sound is used in a word?

Once I have more information, I can help you understand the sound and how it might be represented in writing.