Negation in Spanish is simple: place no directly before the conjugated verb.

Basic Negation

• Hablo español. → No hablo español. — I don't speak Spanish.
• Tengo hambre. → No tengo hambre. — I'm not hungry.

Double Negation

Spanish requires double negation — it is grammatically correct and mandatory:

• No tengo nada. — I have nothing. (lit. I don't have nothing)
• No hay nadie aquí. — There is nobody here.
• No voy nunca. — I never go.

Key Negative Words

• nada — nothing
• nadie — nobody
• nunca / jamás — never
• tampoco — neither / not either
• ningún / ninguno — none

If the negative word comes before the verb, you don't need no: Nunca como carne. — I never eat meat.