Do you use your thumb for shift in games?

pls refer to the title
(i also use thumb for ctrl)

 

I think this person can answer your question with a letter IllegalWiFi

 

Regardless of whether crouch is on shift or ctrl, I use my little finger.

 

I use my pinky finger for the shift :I and my thumb for space

 

Pinky for shift
Thumb for SPACE

 

I use thumb on both.