Forming the imperative for usted/ustedes/nosotros/nosotras (affirmative and negative commands)

In Spanish, the nosotros/nosotras/usted/ustedes forms of El Imperativo, both in affirmative and negative commands take same form as El Presente de Subjuntivo.

Here is a reminder of regular verbs conjugations in El Presente de Subjuntivo:

Conjugate regular -ar verbs in the present subjunctive in Spanish (El Presente de Subjuntivo)

Conjugate regular -er and -ir verbs in the present subjunctive in Spanish (El Presente de Subjuntivo)

Bear in mind that there are lots of verbs with stem-change and consonant change in the present subjunctive, though.

Let's look at nosotros/nosotras first, then usted/ustedes.

Spanish imperative of Nosotros/Nosotras (we)

To say Let's [do something] or Let's not [do something]  in Spanish as a form of command to ourselves we use the verb in the present subjunctive form for nosotros/nosotras (first person plural). 

Have a look at these examples:

Alternative structures not using the imperative

Bear in mind though, that in a more colloquial way, we would probably use an interrogative sentence introduced by "¿Por qué no...?" followed by El Presente with the same purpose, an affirmative command to "ourselves". For example:

And in the negative cases, we would probably prefer to use a different sentence structure introduced by "Mejor no..." followed by El Presente. For example:

Both "¿Por qué no...?" and "Mejor no..." followed by El Presente are more frequently used in speech than their equivalent forms using the imperative:

Here are other examples using the imperative:

Spanish imperative of Usted and Ustedes (you formal singular and plural)

To express an affirmative or negative command directed to "you" (formal) we also use the usted/ustedes form (3rd person singular/plural) in El Presente de Subjuntivo. A typical situation is in a formal conversation or transaction, for example in a bank.

Here are some examples:

Another typical context for this is road signs:

Here are more examples (usted):

Here are more examples (ustedes):