Spanish adverbs of manner: -mente, bien and mal

Short answer

Spanish builds most adverbs of manner by adding *-mente* to the **feminine** form of the adjective: *rápida* becomes *rápidamente*, *fácil* becomes *fácilmente*. The adjective keeps its own accent. *Bien* and *mal* are irregular and very common. In speech Peruvians often drop the ending altogether — *habla rápido*, *camina lento*.

Course · Unit: Adverbs CEFR A2 Reviewed by Jhoslyn Updated 2026-09-12

Draft copy. Every claim needs a native-speaker check before publishing — the byline is what makes this citable, so it has to be earned.

Building one

Take the adjective. Put it in its feminine singular form. Add -mente.

Adjective	Feminine	Adverb
rápido	rápida	rápidamente
lento	lenta	lentamente
serio	seria	seriamente
honesto	honesta	honestamente
grosero	grosera	groseramente

If the adjective has no separate feminine form, nothing changes before you add the ending: fácil → fácilmente, fuerte → fuertemente, saludable → saludablemente.

Two details that trip people up. The adjective keeps its written accent: fácilmente, rápidamente, not facilmente. And the adverb itself never agrees with anything — ellas hablan claramente, not claramentes. Adverbs are invariable, always, in every sentence.

Bien and mal do not follow the pattern

The two you will use most are irregular, and they are not the adverbs of bueno and malo in form, only in meaning.

	Adjective	Adverb
good / well	bueno	bien
bad / badly	malo	mal
better	mejor	mejor
worse	peor	peor

This is where English speakers make the single commonest error in this topic: using the adjective where the adverb belongs.

Hablo bien español. — I speak Spanish well. Not hablo bueno.
El niño escribe mal. — the child writes badly. Not escribe malo.
La sopa está buena. — the soup is good. Here buena is right, because it describes the soup, not the way anything is done.

The test is what the word is about. Describing a thing → adjective, and it agrees. Describing how an action happens → adverb, and it never agrees.

Where the adverb goes

After the verb it modifies: Mariana está leyendo rápidamente.

Before an adjective or another adverb: Roberto va a trabajar muy tarde.

That is the whole rule, and Spanish is fairly relaxed about it. What you must not do is drop the adverb between a verb and its object the way English does — he speaks perfectly Spanish is wrong in English too, and habla perfectamente español is only just acceptable in Spanish. Habla español perfectamente is safer.

What Peruvians actually say

Two habits worth copying.

The bare adjective as an adverb. In everyday speech the short form beats the -mente form: habla rápido, camina lento, maneja despacio. Rápidamente and lentamente are not wrong, they just sound written.

Bien as an intensifier. Where a book says muy, Lima says bien:

Está bien rico. — it’s really tasty
Llegó bien temprano. — he got there really early
Está bien caro. — it’s really expensive

This is colloquial and completely standard in Peru. It does not replace muy in writing, but it is everywhere in speech.

The ones to learn as a set

bien — well · mal — badly
mejor — better · peor — worse
despacio, lentamente — slowly
rápido, rápidamente — quickly
así — like this, that way
claramente — clearly · fácilmente — easily · seriamente — seriously

¿Puede hablar más despacio, por favor? is the single most useful sentence on this page. Learn that one first.

Try it

Pick the right word:

Ella cocina muy ___. (bien / buena)
La comida está ___. (bien / buena)
fácil → ?
serio → ?

→ 1 bien (how she cooks) · 2 buena (what the food is like) · 3 fácilmente · 4 seriamente.

The other family of adverbs you need early: how often things happen.

→ Spanish frequency adverbs

Topics Adjectives Peruvian Spanish

Bien, buena, or -mente?

Seven questions on building adverbs, and on the adjective English speakers keep using where an adverb belongs.

1Ella habla ___ español.
Answer

bien — *Bien* is the adverb — it describes how she speaks. *Bueno* is an adjective and would have to describe a thing, not an action.
2The adverb from *rápido* is:
Answer

rápidamente — *-mente* attaches to the feminine form, *rápida*, and the adjective keeps its own written accent. That accent is not optional.
3La sopa está muy ___.
Answer

buena — Here you are describing the soup, so it takes an adjective and it agrees: *buena*. *Está bien* would mean it is acceptable, not tasty.
4Which is the adverb from *fácil*?
Answer

fácilmente — *Fácil* has no separate feminine form, so nothing changes before *-mente* — but the accent stays where it was.
5In Lima you hear *está bien rico*. *Bien* here is doing the job of:
Answer

muy — Colloquial Peruvian Spanish uses *bien* as an intensifier in front of adjectives where the book says *muy*. It is everywhere in speech.
6You want someone to slow down. You say:
Answer

¿Puede hablar más despacio, por favor? — *Más despacio* is the fixed phrase for this, and *por favor* does the rest. *Hablar bien* would be asking them to speak properly, which is a different request.
7Ellas trabajan ___.
Answer

seriamente — Adverbs never agree with anything, however plural the subject. One form, always: *seriamente*.