USTED commands, also called formal commands, are conjugated using the present subjunctive in the usted form, regardless of whether it's a positive or negative command. The irregulars (6) are the same as in the present subjunctive form.
Verb | POSITIVE COMMAND | NEGATIVE COMMAND |
beber | beba | no beba |
jugar | juegue | no juegue |
almorzar | almuerce | no almuerce |
If the verb is reflexive, you have different rules for the reflexive pronoun depending on whether it's a positive or negative command.
Verb | POSITIVE COMMAND | NEGATIVE COMMAND |
acostarse | acuéstese | no se acueste |
despertarse | despiértese | no se despierte |