Respuesta :

 the negative form of usted   in the vern respirar is :
usted no respira 

Answer:

No respire

Explanation:

To create an usted command, take the original verb and put it in its yo form. Respirar becomes respiro. Then, take off the yo ending, and add the opposite ending. Since respirar is an -ar verb, put the -er ending on. This becomes respire. To make it a negative command, simply add no before the verb.