pronombres de complementos
referring to things already startedpronouns attached to command verb (already conjugated)
Coma la ensalada.
Comala.No la coma usted.
negative
pronouns are not attached, go before command verb
Sirva el postre.
Sirvalo.No lo sirvo usted.
Accent rule
If you add one or more syllables to a command, you must add an accent.
Lave los platos.
Lavelos.No los lave usted.