Nosotros al lado de un lago. vivimos vivemos vivir viven ¡ la mesa! pongo ponga pone pon ¡ las ventanas! limpia limpian limpias limpiar which would be true for forming an informal command? you use the infinitive of the verb. you just need to change the tone of your voice. you use the formal (ud.) form of the verb. you use the informal (tú) form of the verb.

1) vivimos

This is the nosotros form of the verb vivir.

2) Pon or Ponga

Pon is the informal command, and based off of the last question, I believe you are supposed to be using informal commands. However, if you are supposed to give the formal command, it is ponga.

3) Limpia

This is the informal command for the verb limpiar, formed by using the present tense el/ella/usted form of the verb.

4) You use the formal (Ud.) form of the verb.

This is how informal commands are formed.

i wish i could but i speak english. sory

usualmente me lavo los dientes antes de acostarme pero ayer no me lavé.  

usualmente hago mis tareas a las 15: 00pm pero ayer las hice a las 20 pm.  

usualmente llego a mi casa a las siete pero ayer volví a las nueve  

usualmente cocino arroz pero ayer cociné fideos.  

usualmente llamo a mi hermano al mediodía pero ayer lo llamé en la noche