Negative Tú Commands

A little more difficult it is to form a negative tú command. You'll notice that the negative command is the same as the present tense subjunctive form of the second person.

No toques el oso. Don't touch the bear.
No pongas los codos sobre la mesa. Don't put elbows on the table.
No hables tan rápido. Don't talk so fast.

If you must place a pronoun anywhere, unlike its affirmative command cousin you mustn't affix the pronoun to the end of the command verb. Instead it precedes it:

No te pongas ese sombrero. Don't put on that hat.
No me des esas miradas. Don't give me those glances!
No lo abras hasta la Navidad. Don't open it until Christmas.

Double object pronouns follow the same hierarchical rule, whereas the indirect object pronouns come before the direct object pronouns:

¡Mentiras! No me las digas... Lies! Don't tell them to me.
No se los presentes a tus padres todavía. Espera un rato. Don't present them to your parents just yet. Wait for awhile.