Question about Simplified

Hi Guys! I'm diving back into my shorthand studies. I'm just starting Lesson 3 from the Gregg Simplified 2nd Ed. manual and had a question.

Later in the manual do they ever get to telling you how to decipher the distinct pronounciation of the vowel?

Like the shorthand writing of a-d, it can be pronounced as Aid or Add. And like the written ch-i-k, can't it be pronounced as Chick or Check? I'm sure if you were to read it in a sentence it would make a little more sense, but for now, do they ever show you, in writting, the correct pronounciation?

Just curious. Thanks!

(by cricketbeautiful-1 for everyone)