Question

Give instructions to people cleaning a house by changing the verb phrases into formal commands

Answer 1

This article refers to "The Imperative Mood/mode" in the Spanish Language;

in Spanish, there are informal and formal forms of you; therefore there are both formal and informal command modes;

Informal commands are mostly used among friends or relatives, and the formal ones are often used to be polite or to show respect, generally to someone older or newly met people, or someone playing as an authority figure.

The imperative mode it's also used to tell people what to do, or give a formal instruction, and it works by removing the verbs' ending and replacing them with: -e or -a.

as in: Vivir (to live) = Viva   Amar (to love) = Ame

Bailar (to dance) = Baile    Dar (to give) = Dé  

Disfrutar (to enjoy) = Disfrute  Jugar (to play) = Juegue

Thus to give instructions to someone cleaning a house, use the following ones:

(wash) Lave; (sweep) Barra; (wax) Encere (shine); (clean) Limpie.