Quick answer
¡No hables! · ¡No lo hagas!
Every negative command uses the subjunctive, and the pronouns move in front of the verb.
No plus the subjunctive
-ar verbs take -e endings, -er and -ir verbs take -a endings. Every person, including tú, uses the subjunctive here.
| Person | hablar | comer |
|---|---|---|
| tú | no hables | no comas |
| usted | no hable | no coma |
| nosotros | no hablemos | no comamos |
| vosotros | no habléis | no comáis |
| ustedes | no hablen | no coman |
The irregulars come from the yo form
Take the yo form of the present, drop the -o, add the opposite vowel. Only a handful sit outside that rule.
| Infinitive | Negative tú |
|---|---|
| hacer (hago) | no hagas |
| tener (tengo) | no tengas |
| salir (salgo) | no salgas |
| venir (vengo) | no vengas |
| decir (digo) | no digas |
| ir | no vayas |
| ser | no seas |
| dar | no des |
| estar | no estés |
Pronouns switch sides
In a positive command pronouns attach to the end. In a negative one they go between no and the verb.
Because the pronoun detaches, the written accent of the positive form disappears.
Memory trick
Negative command means no + subjunctive, and the pronouns stand in front. Nothing ever attaches to the end after no.
Typical mistakes
No habla tan alto.
No hables tan alto.
No hablas or no habla is a statement. A command to tú needs the subjunctive form hables.
¡No dímelo!
¡No me lo digas!
With no the pronouns move in front of the verb and the accent goes away.
No te vayas a casa. / No vete a casa.
No te vayas a casa.
Vete is the positive form. The negative takes no te vayas.
Check yourself
___ tan tarde, por favor. (no llegar, tú)