Reflexive, indirect object, and direct object pronouns must be attached to the end of an affirmative command. Remember the acronym RID because, if more than one of these pronouns are used together, they will consistently be used in that order.
Reflexive, direct object and indirect object pronoun, must be attached to an affirmative command. In all cases, with affirmative commands, the object pronouns are attached to the imperative form of the verb. One way to remember the order is with the acronym: RID that stands for Reflexive+ Indirect+Direct object pronoun.
Compre usted el carro.
Cómprelo ud.
If both direct and indirect object pronouns are attached, for example when you write “lo,” or “la” at the end of a word, the indirect object pronoun comes before the direct object pronoun. For example, me + lo are attached as “melo” at the end of the command.
Cómpremelo ud. Buy it from me
When you write a command with two pronouns, an accent is used to keep the stress on the same syllable of the verb.
Command: haz (one syllable)
hazlo (one pronoun, no accent required)
házmelo (two pronouns, accent is required)
When writing a negative command, the object pronoun goes before the imperative form of the verb.
No venda usted el carro – Do not sell the car.
No lo venda – Do not sell it.
One way to remember how to write commands with pronouns is to follow this rule: if the indirect object pronoun le or les comes before lo, la, los or las, you change it to “se.”
le lo = se lo Gladys se las regaló a ella. (third person)
le los = se los Julio te las dio a ti (second person)
le las = se las Laura me las compró a mí (first person)
les la = se la Ernesto se los vendió a ellos.
les los = se los
les las = se las
You can attach certain direct object pronouns and indirect object pronouns to command forms! If you’re using affirmative commands, the pronouns are attached directly to the end of the verb. If you’re using negative commands, the pronouns go directly before the verb. If the stress of the word (with the command and the attached pronouns) ends up on the third-to-last syllable or earlier, an accent mark is added to where the emphasis would usually fall if the word was unchanged (cómpralo, dígamelo).