Explanation: For tú commands with -AR verbs, drop the -a from the él/ella form. él habla → ¡Habla!
Explanation: Negative tú commands use the subjunctive form (no + tú form). "No comas" is the subjunctive form of comer.
Explanation: Formal commands use the subjunctive. For ir, the subjunctive is vaya. ¡Vaya! is the formal singular command.
Explanation: "Hacer" has an irregular tú command: haz. This is a common irregular that must be memorized.
Explanation: For ustedes commands, use the subjunctive form. For -IR verbs, it ends in -an. escribir → escriban
Explanation: ¡Siéntate! (sit down, informal tú) uses the reflexive pronoun. ¡Sienta! would be formal, but the more common command is ¡Siéntese!
Explanation: "Let's" commands use the nosotros form of the subjunctive. For -AR verbs, it ends in -emos. hablar → hablemos
Explanation: Negative usted commands use no + subjunctive. For -ER verbs in usted, it's no + beba. ¡No beba! is correct.