"वे बहुत तेज़ नाचते हैं।"

Translation: They dance very fast.

[MrRoboto7]

'They dance very quickly' should also be accepted

[Sam362597]

Agreed. In BrEng I think this is the only correct answer - fast is an adjective and quickly an adverb. I think fast is acceptable as an adverb in AmEng though, and probably casually fine in BrEng too.

[This_is_Roshan]

According to the Oxford dictionary, 'fast' is an adverb as well as an adjective in British English.

[whimslcott]

I was always taught that "quickly" was acceptable while "fast" was not.

[Carissa789117]

They dance very fast sounds weird to me. "Quickly" at least should be accepted.

[PrakharBav]

in hindi quickly translates to जल्दी

[JamesTWils]

Is there any difference between adverbs and adjectives in Hindi? Could तेज़ be used as either?

[yuhua1a]

Adjectives sometimes inflect while adverbs do not from my understanding. And it appears that तेज़ is both.

[LinguisticBoi]

is तेज़ the adverb? and what about "धीरे" is that an adverb? what's the adjective forms?

[benros1]

How would you translate
''They dance too fast/quickly?''

[Sam362597]

Bahut zyada tez, I think.

[DennisLDuolingo]

How would you say "They dance faster."?

[shukladhaivat17]

They dance pretty fast. Could this be right?

[shemayokamaraii]

Not really. "Pretty" is a de-intensifier almost.

[JustinG01]

"very quickly" is grammatically correct here, "very fast" is colloquial but grammatically incorrect (but should probably still be accepted).

[Sean_Roy]

"They dance very fast" is grammatically correct, as 'fast' is an adverb as well as an adjective.