"O teclado fica sujo rápido."

Translation: The keyboard gets dirty fast.

[ajvincent]

I think "gets dirty fast" sounds strange in English - it should be the adverb "quickly"

[GidgetGilda]

Whether or not a person says "gets dirty rapidly" "gets dirty fast" or "gets dirty quickly" differs by region. I hear all of those used regularly.

[sunnyfairytale]

Fast can be an adverb as well as an adjective, so it is correct here. Maybe it sounds odd (I thought so too) because most adverbs end in -ly.

[DenverLema1]

Fast and quick are the same thing. However, it is important to know that quick can also refer to a period of time, instead of just the speed of something, which fast normally refers to. That being said, they are usually interchangeable.

[KPThomson]

I completely agree.

[Juknow92]

Well, quickly is not excepted

[JustinBlak101743]

It might not sound as nice, but it's definitely valid here in the States.

[vam1980]

Is 'teclado' a keyboard from a computer or the musical instrument (or both)?

[snoipah]

Both

[AlfieValera]

Fica means is/stay right. So can it also mean gets? In what context?

[Paulenrique]

it means "to get" when it has the sense of "to become".

[bbeeco]

Can you give a few examples?

[BenHueb]

I believe this was from the lesson on colors:
Ele fica amarelo.

[Danmoller]

Ser vs ficar vs estar

Look in the "characteristics" session:

https://www.duolingo.com/comment/2233756

[Jonathanchlj]

"Rápido" seems strange here to me, shouldn't it be an adverb like "rapidamente"? I know that I'm probably wrong, but In French and it Italian it should be rapidement/rapidamente.

[PHScanes]

In this case, rápido and rapidamente are the same adverb

[jamie962562]

I won't ask how

[Freddy22768]

quickly was not accepted, what a shame.
Please correckt quickly

[DenverLema1]

Quick / fast == rápido;
Quickly == rapidamente ou depressa.

[DenverLema1]

UM ... Contributors, the recommended answer for this question is entirely broken. Duo literally just translated: O teclado fica sujo rápido -> It will turn back on in 1 hour. I am I surprised, no, but it should be fixed!

[Amelie_007]

How do we know "fica sujo" means gera dirty? Fast had been translated as to stay and to become. Those are two different ideas in this context.