P. 382 Realidades 2

 To give an affirmative or negative command in the Ud. or Uds. form, use the present-tense yo form as the stem just as you did for negative tú commands.

 Add -e or -en for -ar verbs.  Cortar  Corto  Señor, corte las chuletas de cerdo.

 Add -e or -en for -ar verbs.  Probar  Pruebo  Señores, prueben la carne asada.

 Affirmative and negative Ud. and Uds. commands have the same spelling changes and irregular forms as negative tú commands.

 The same rules you know for tú commands regarding pronouns apply to Ud. and Uds. as well.

 Attach pronouns to affirmative commands.  ¿Dónde ponemos la leña?  Pónganla en un lugar seco.

 With negative commands, pronouns go right before the verb.  ¿Encendemos la fogata ahora?  No, no la enciendan todavía.

 Add -a or -an for -er and -ir verbs.  Perder  Pierdo  No perdan Uds. los fósforos.

 Add -a or -an for -er and -ir verbs.  Servir  Sirvo  Señorita, sirva la ensalada.

 Buscar - Negative tú command?  No busques  Ud. command?  No busque  Uds. command?  No busquen

 Hacer - Negative tú command?  No hagas  Ud. command?  No haga  Uds. command?  No hagan

 Dar - Negative tú command?  No des  Ud. command?  No dé  Uds. command?  No den

 Ir - Negative tú command?  No vayas  Ud. command?  No vaya  Uds. command?  No vayan

 Ser - Negative tú command?  No seas  Ud. command?  No sea  Uds. command?  No sean